JP2003020954A - Sound insulated power generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a sound insulation effect, protect sound absorbing material in a casing, and increase the durability of the sound absorbing material in this power generating device having a cooling air inlet for cooling an engine and a generator provided in the side plate of a power generating device casing. SOLUTION: The engine 11, the generator 12, a fuel tank 13, and the controller 26 of the power generating device are disposed in the power generating device casing, and a sound insulation board 25 having the sound absorbing material 81 stuck thereon is disposed between the fuel tank 13 and the controller 26. Thus, noise can be absorbed by the fuel tank 13, noise transmitted to a controller 26 disposed part can be reduced, noise from the controller 26 can be reduced, and the noise of the power generating device can be reduced.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for reducing noise generated from a power generator. More specifically, the present invention relates to a noise reduction structure in a packaged power generator. 2. Description of the Related Art A soundproof generator is used to supply electric power at a construction site or the like. The soundproof generator is transported to the site and generates power. Conventionally,
JP-A-2000-282 discloses a soundproofing technique for a soundproof generator.
The one shown in Japanese Patent Publication No. 885 is known. This is one in which a shielding plate or the like to which a sound absorbing material is attached is provided in the structure on the exhaust side. [0003] Japanese Patent Application Laid-Open No. 2000-282
In the technique disclosed in Japanese Patent Publication No. 885, it is difficult to make the entire length of the soundproof generator compact, and it is difficult to improve the soundproofing effect on the intake side. As mentioned above, the soundproof generator is transported to the site,
It is to be placed on site. For this reason, when the overall length is large, the efficiency may be reduced in terms of transportability and installation. [0004] In order to solve the above problems, the present invention employs the following means. As set forth in claim 1, a power generating device provided with a cooling air intake for cooling an engine, a generator, and the like on a side plate of a power generating device housing, wherein the engine, the generator, the fuel tank, and the power generating device are provided in the housing. In addition to installing a control device,
A sound insulating plate with sound absorbing material attached is installed between the fuel tank and the control device. An embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of the power generator, FIG. 2 is a side view showing the internal configuration of the power generator, FIG. 3 is a rear view thereof, FIG. 4 is a front view showing the configuration of the opening / closing door, and FIG. FIGS. 6 and 7 show the assembly configuration of the opening and closing door, FIG. 7 is a view from above the upper partition, FIG. 8 is a side view thereof, FIG. 9 is a front view thereof, and FIG. FIG. 11 is a side view showing an arrangement of a fuel tank and a sound insulating plate. First, the overall configuration of the power generator will be described with reference to FIGS. A frame 10 is provided in the lower part of the power generator 1, and components of the power generator 1 are provided on the lower frame 10. Then, a soundproof cover is mounted on the lower frame 10 to improve the soundproofing effect. In the power generator 1,
The lower frame 10 and the soundproof cover constitute a housing of the power generator 1. The power generator 1 has a control panel 2 and a power outlet 3 on the short side, and doors 4 and 5 on the long side. The control panel 2 controls the power generation device 1 and displays an operation state. The power generated by the power generator 1 is extracted by connecting a wire to the power outlet 3. The doors 4 and 5 are configured to open symmetrically from the center to both left and right sides. Thereby, the opening amount on the side surface of the power generation device 1 can be increased, and the maintainability can be improved. In addition, on the long side surface of the power generation device 1, an intake port 6.7 b and a fuel display window 8 are provided. A locking portion 9 for hanging the power generator 1 is provided on the upper part of the power generator 1. Locking part 9
Is provided with a reinforcing member 61 in the vertical direction. The power generator 1 includes an engine 11, a generator 12, a fuel tank 13, and a battery 14. A generator 12 is connected to the engine 11,
The generator 12 is driven by the output shaft of the engine 11. A battery 14 is provided beside the generator 12, and a fuel tank 13 is provided above the generator 12. In FIG. 2, a partition wall 3 is located on the left side of the generator 12.
Two mounts 31 are provided, and the air inlet 6 is provided on the left side of the mount 31. The generator 1 is mounted on the mounting base 31.
A partition 32 for partitioning the fuel tank 2 from the fuel tank 13 is disposed in the horizontal direction. The shielding plate 2 is provided on the left side of the fuel tank 13.
5 is provided to reduce the noise of the engine 11 transmitted to the control box 26 side. On the right side of the engine 11, a fan 21, a radiator 17, and mufflers 22 and 23 are arranged. A guide 24 is provided above the muffler 22. Guide 2
Numeral 4 is for guiding the cooling air generated by the fan 21 to the exhaust port 30, and is provided at the upper corner of the power generator 1. The guide 24 is formed in a T-shape as shown in FIG. 2, and is arranged from the near side of the paper toward the back. The air outlet 30 is provided at substantially the center of the upper surface of the power generator 1. For this reason, in the power generator 1, the exhaust air can be discharged from a position farthest from the outer peripheral portion, and the influence on the surroundings can be reduced. An air cleaner 16 is disposed above the engine 11, and an upper partition 1 is provided above the air cleaner 16.
8 are provided. The upper partition 18 is provided between the engine 11 and the exhaust port 30. This allows
Noise generated by the engine 11 does not directly go out of the power generator 1 through the exhaust port 30. Air Cleaner 1
Numeral 6 is attached to the stay 35 shown in FIG.
An intake chamber 15 is provided on the lower surface of the upper partition wall 18, and air is introduced into the intake chamber 15 through an intake pipe 34. The intake chamber 15 is connected to an air cleaner 16, and air is supplied to the air cleaner 16 via the intake chamber 15. The air introduced into the air cleaner 16 is supplied to the engine 11. In the power generator 1, the engine 11
The generator 12 is attached to the lower frame 10 via a vibration isolator. Engine 1 in frame 10
1 and a pedestal on which the generator 12 is mounted. The pedestal is mounted on the pedestal via vibration isolating materials 27 and 28.
1 and a generator 12 are provided. Therefore, vibration transmitted to the cover of the power generation device 1 is reduced, and noise is suppressed. An intake port and an exhaust port are provided at an upper portion of the engine 11, and a central portion of the engine 11 is constituted by a cylinder block of the engine 11 and a crankcase. The cylinder block accommodates the piston inside and has a cooling water path inside. The crankcase supports the crankshaft. For this reason, the rigidity of the cylinder block and the crankcase is configured to be high. An oil pan 29 is provided below the engine 11. A drain 33 is connected to the oil pan 29 so that engine oil can be discharged from the outside of the lower frame 10. Next, the structure of the door 5 will be described with reference to FIGS. The opening / closing door 5 is configured to be openable and closable on a side surface of the power generation device 1. As shown in FIG. 4, an opening 7 is provided in the front of the opening / closing door 5, and air is introduced into the power generation device 1 through the opening 7. A hinge 41 is provided at the side end of the door 5.
41 is fixedly provided, and can be opened and closed around the hinges 41. Further, a handle portion 44 is provided on the side opposite to the side where the hinge 41 is provided,
The opening / closing door 5 is opened and closed by the handle 44. The opening / closing door 5 is mainly constituted by a front part 42 and an intake duct 43. The front part 42 constitutes the front of the door 5 and is located on the outer side of the power generator 1. The intake port 7 is provided at a lower portion of the front portion 42 on the side where the hinge 41 is provided, as described above. An intake duct 43 is attached to the rear surface of the front part 42. The intake duct 43 is fixed to the front portion 42 with fasteners such as bolts. Intake duct 43
The rear surface (the surface located inside the power generation device) is configured to be flat, and has a configuration in which the protrusion into the power generation device is small. A plate 49 is formed in the intake duct 43, and the plate 49 of the intake duct 43 and the front part 42 are fixed by fasteners. In addition, the intake duct 43 is configured to be detachable from the front part 42. An outside air outlet 45 is provided in the air intake duct 43, and air introduced from the air inlet 7 in the front part 42 is introduced into the power generation device 1 from the outside air outlet 45. Between the front part 42 and the intake duct 43, sound absorbing members 46, 47 and 48 are provided. The sound absorbing material 46 is provided on the back surface of the front part 42. In the sound absorbing material 46, a portion corresponding to the intake port 7 is cut out, so that the sound absorbing material 46 does not hinder the introduction of air from the intake port 7. The sound absorbing member 46 has a configuration in which a portion corresponding to a bolt mounting portion for mounting the intake duct 43 to the front portion 42 is cut out, so that the intake duct 43 can be securely attached to the front portion 42. . A sound absorbing material 47 is provided on the inner upper surface and the inner side surface of the intake duct 43, and an adsorbent 48 is provided on the inner front surface of the intake duct 43. Adsorbent 48
The outside air outlet 45 side portion has a configuration in which a portion overlapping the outside air outlet 45 is cut out. The intake duct 43 is fixed to the back of the front part 42 and is integrally formed with the door 5. Thereby, the degree of freedom of the arrangement position of the intake port 7 and the arrangement position of the outside air outlet 45 can be improved, and it can be easily provided at a position in the power generating apparatus where noise is small. In the power generating device 1, low noise can be achieved by arranging the low noise position in a position where the engine noise is low, a position where the generator noise is low, a position where the cooling wind noise of the generator is low, and the like. . Furthermore, the rigidity of the opening and closing door 5 is improved by fixing the intake duct 43 to the opening and closing door 5, and noise from the side of the power generation device 1 can be reduced. Further, the rear surface of the intake duct 43 is flat, so that the number of parts of the sound absorbing material to be attached to the inside of the intake duct 43 and the number of attaching steps can be reduced. Further, the length of the intake path in the intake duct 43 can be increased, and the sound absorbing effect can be improved. The opening / closing door 5 becomes a double partition, and the sound insulation effect is enhanced. Next, referring to FIG. 7 to FIG.
8 will be described. The upper partition 18 is the power generator 1
From the one side to the opposite side is disposed above the engine 11. The upper partition 18 is connected to the radiator mounting portion 65 and the reinforcing member 61. Accordingly, an exhaust path using the inner surface of the soundproof cover can be configured in the power generation device 1, and noise can be reduced while the power generation device 1 is compact. Furthermore, the engine room and the exhaust path downstream of the radiator 17 can be reliably isolated, and the cooling effect can be improved. The intake chamber 15 is connected to the lower surface of the upper partition 18, and a guide 51 is provided on the upper surface. The guide portion of the guide 51 extends toward the air outlet 30, and the guide 51 is disposed obliquely with respect to the air discharge path. The upper partition 18 has a configuration in which the side on which the intake chamber 15 is provided is one step lower, and the guide 51 is provided on the upper surface of the one step lower part. The guide 51 serves as a baffle against noise passing over the upper partition wall 18. When the sound wave of the noise hits the guide 51, the sound wave is dispersed, and the noise reduction effect is improved. Further, a sound absorbing material is attached to the guide 51 on the side of the exhaust passage (the side of the exhaust passage), so that a further noise reduction effect can be obtained. Further, the arrangement of the guide 51 may be horizontal in addition to the oblique direction with respect to the air discharge path as described above. The suction chamber 15 has a lower pipe 54 and a side pipe 53 communicating with the inside and outside of the suction chamber 15.
Are arranged. A plurality of partition plates 52 are provided in the intake chamber 15. A lower pipe 54 is provided on the bottom surface of the intake chamber 15. The intake pipe 34 is connected to the lower pipe 54, and air in the power generator 1 is introduced into the intake chamber 15 via the intake pipe 34 and the lower pipe 54. A side pipe 53 is provided on a side surface of the intake chamber 15. Side pipe 5
An air cleaner 16 is connected to 3. The lower pipe 54 and the side pipe 53 are connected to the intake chamber 1.
5 and a certain amount. By adjusting the amount of protrusion into the intake chamber 15, the frequency characteristics of the intake chamber 15 can be adjusted, and the noise reduction effect can be improved. The partition plate 52 disposed in the intake chamber 15 is disposed so as to block a straight path connecting the outlet side of the lower pipe 54 and the side pipe 53. The partition plate 52 is connected to one inner surface of the suction chamber 15,
It is configured to be connected to alternately facing inner surfaces. Thus, the length of the intake path in the intake chamber 15 is increased, and a maze is formed, so that the sound absorbing effect can be improved. The radiator 17 is connected at an upper portion to a radiator mounting portion 65 and at a lower portion to a radiator mounting portion 62. Then, the radiator mounting portion 62
A guide plate 63 is fixedly mounted on the upper part. Guide plate 6
Reference numeral 3 is shaped like a letter when viewed from the side, and directs the exhaust air discharged through the radiator upward. The exhaust air directed upward by the guide plate 63 is directed to the upper partition wall 18 by the guides 24 disposed at the corners of the housing of the power generator 1. The exhaust air passing over the upper partition 18 is directed to the exhaust port 30 by a guide plate 64 arranged near the locking portion 9. The guide plate 64 is provided on the upper partition 18 on the downstream side of the exhaust air, and is disposed obliquely with respect to the upper partition 18. Thus, the noise reduction effect can be improved while reducing the exhaust resistance. At the upper end of the guide plate 64, a sealing member such as a weather strip is mounted.
The noise of the engine 11 is prevented from leaking from the space between the engine and the soundproof cover, and the rainwater and dust are prevented from entering. Next, the structure of the shielding plates 55 and 56 disposed near the generator 12 will be described with reference to FIG. The shielding plate 56 is perpendicular to the axial direction of the generator 12,
The shielding plate 55 is disposed above the upper portion, and the shielding plate 55 is also disposed below the lower portion of the generator 12.
The lower part of the shielding plate 56 is cut out in an arc shape, and the notched part is arranged along the upper part of the generator 12. In addition, the upper part of the shielding plate 55
Are cut out along the lower part of the generator 12 and are arranged along the lower part of the generator 12. Shielding plates 56 and 55
Is disposed on the radial surface of the generator 12 so as to close the projection surface inside the housing of the power generator 1. This makes it difficult for the noise generated by the engine to propagate to the generator 12 side, thereby reducing the noise. The shielding plate 56
A gap is provided between the lower end of the cover plate 55 and the upper end of the shielding plate 55, and the cooling air passes through the gap. Also, a gap is provided between the lower end of the shielding plate 56 and the generator 12, and between the upper end of the shielding plate 55 and the generator 12.
2 has a configuration in which cooling air passes along the outer peripheral surface. Referring to FIG. 11, control box 2
6 and the fuel tank 13 will be described. The control box 26 is a control device of the power generation device 1.
The operation of the power generator 1 is controlled by the operating device disposed in the power generator 1. In FIG. 11, the fuel tank 13 is disposed on the right side of the control box 26.
The fuel of the engine 11 is stored in the fuel tank 13. The fuel tank 13 has a partition wall 3 disposed horizontally.
The mounting base 31 which is vertically arranged is connected to the partition wall 32. Mounting base 31 and partition wall 3
Numeral 2 is for suppressing noise of the generator 12 and the engine 11, and is configured to cover the upper side and the left side of the generator 12 connected to the engine 11. Fuel tank 1
The right side of 3 is a path for supplying cooling air to the engine 11. Therefore, the noise of the engine 11 is transmitted from the left side of the fuel tank 13. The sound insulating plate 25 is provided between the fuel tank 13 and the control box 26. The sound insulating plate 25 has a width substantially equal to the width of the power generator 1. Thereby, soundproofing is performed in front of the fuel tank 13. Further, a sound absorbing material 81 is adhered to the sound insulating plate 25 to improve the sound insulating properties of the sound insulating plate 25. The sound insulating plate 25 is provided between the fuel tank 13 and the engine 1.
1 is disposed on the opposite side. For this reason, the noise of the engine 11 is reduced by the fuel tank 13 from the sound insulating plate 25, and thereafter the noise is further suppressed by the sound insulating plate 25. In the sound insulating plate 25, the sound absorbing material 81 is affixed to the surface of the control box 26 to improve the sound insulating effect. Since the sound absorbing material 81 is adhered to the sound insulating plate 25, the fuel in the fuel tank 13 hardly adheres to the sound absorbing material 81, and the deterioration of the sound absorbing material 81 can be suppressed. Sound absorbing material 81
Since the sound insulating plate 25 to which is attached is disposed near the fuel tank 13, the fuel tank 13 can be effectively used as a member for reducing noise. Thereby, noise can be reduced and the power generation device 1 can be made compact. The control box 2 is provided by the sound insulating plate 25.
6, the noise leaking from the cable connection portion of the control box 26 can be reduced. A cable connected to the engine 11 and the generator 12 is connected to the control box 26. For this reason, the soundproofing effect may be lower than in other housing parts. However, the control box 26
Before the noise is transmitted to the device, the noise is reduced by the sound insulating plate 25 and the sound absorbing material 81, so that efficient soundproofing can be performed. According to the first aspect of the present invention, there is provided a power generator having a cooling air intake for cooling an engine, a generator, and the like on a side plate of a power generator housing. Control device for the engine, fuel tank, and power generator, and a sound insulation plate with a sound absorbing material attached between the fuel tank and the control device. It is possible to improve the durability of the adsorbent. And it becomes possible to make a power generation apparatus compact and to reduce noise.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a power generator. FIG. 2 is a side view showing the internal configuration of the power generation device. FIG. 3 is a rear view of the same. FIG. 4 is a front view showing a configuration of an opening / closing door. FIG. 5 is a partially cutaway view of the same side. FIG. 6 is a diagram showing an assembling configuration of an opening / closing door. FIG. 7 is a view of the upper partition seen from above. FIG. 8 is a side view of the same. FIG. 9 is a front view of the same. FIG. 10 is a diagram showing a configuration of a shielding plate provided near a generator. FIG. 11 is a side view showing an arrangement configuration of a fuel tank and a sound insulating plate. [Description of Signs] 1 Power generation device 5 Opening / closing door 12 Generator 13 Fuel tank 15 Intake chamber 17 Radiator 18 Upper partition 25 Sound insulation plate 26 Control box 81 Sound absorbing material

Claims (1)

Claims 1. A power generating device provided with a cooling air intake for cooling an engine and a generator on a side plate of a power generating device housing, wherein an engine, a generator, a fuel tank, and A soundproof type power generation device comprising a control device for a power generation device, and a sound insulation plate having a sound absorbing material attached between a fuel tank and the control device.