JP4054767B2 - Soundproof power generator - Google Patents

Description

  The present invention relates to a technique for reducing noise generated from a power generation device. More specifically, the present invention relates to a noise reduction structure in a package type power generator.

  The soundproof generator is used to supply power at a construction site or the like. Soundproof generators are transported to the site and generate electricity. Conventionally, what is shown in Unexamined-Japanese-Patent No. 2000-282885 is known as a soundproof technique of a soundproof type generator. In this structure, a shielding plate or the like to which a sound absorbing material is attached is disposed in the exhaust side structure.

Japanese Patent Laid-Open No. 2000-282885

  In the technique disclosed in Japanese Patent Application Laid-Open No. 2000-282885, it is difficult to make the entire length of the soundproof type generator compact, and the power generator becomes large in order to improve the soundproof effect on the exhaust side.

  As described above, the soundproof generator is transported to the site and placed on the site. For this reason, when the total length is large, the efficiency may be lowered in terms of transportability and installation.

  In order to solve the above-mentioned problems, the following measures are taken in the present invention.

In Claim 1, it is a soundproof type electric power generating apparatus which provided the cooling air intake which cools an engine (111) and a generator (112) in the side plate of a soundproof case, Comprising: In a soundproof case above an engine (111) An exhaust duct is provided, and an exhaust port (130) of the exhaust duct is provided on the ceiling plate of the soundproof case, and the radiator (117) side of the engine (111) is also perpendicular to the exhaust duct. In a configuration in which a bent exhaust duct is provided, and a muffler (122) is provided in the exhaust duct, the ceiling plate of the soundproof case that opens the exhaust outlet (130) and the upper surface of the engine (111) An upper partition wall (118) inclined downward toward the radiator (117) is provided, and a drain port (137a) is provided at an end of the upper partition wall (118) on the radiator (117) side, and the drain port (137a ) La A dam (125) is provided on the eta (117) side, a rainwater guide passage (137) is provided in the vertical direction from the drain port (137a), and the lower end of the rainwater guide passage (137) is connected to the lower frame (110). The rainwater guide passage (137) communicates with the outside of the power generation device (101), and the rainwater guide passage (137) is brought into contact with the bottom plate (142) of the muffler chamber (141), so that water enters the weir (125 ) Is provided with a rainwater guide hole (137c) that can flow into the rainwater guide passage (137) even when the vehicle passes over the rear muffler chamber (141) .

According to Claim 2, in the soundproof type power generator according to Claim 1, the muffler chamber bottom plate (142) of the portion where the rainwater guide passage (137) abuts is directed downward toward the rainwater guide hole (137c). It is slanted .

Since the present invention is configured as described above, the following effects can be obtained.
As in claim 1, a soundproof type power generation device provided with a cooling air intake for cooling the engine 111 and the generator 112 on the side plate of the soundproof case, wherein a wind exhaust duct is provided in the soundproof case above the engine 111, The exhaust duct 130 of the exhaust duct is provided in the ceiling plate of the soundproof case, and the exhaust duct that is bent vertically from the exhaust duct is also provided on the side of the radiator 117 of the engine 111. In the configuration in which the muffler 122 is provided, the upper partition wall 118 that is inclined downward toward the radiator 117 is provided between the ceiling plate of the soundproof case that opens the exhaust vent 130 and the upper surface of the engine 111. Rainwater or the like entering from the air outlet can smoothly flow on the upper partition wall 118.

Further, since there is provided a drainage port 137a to the end on the side of the radiator 117 of the upper partition 118, water on the partition plate can flow into drain outlet. Therefore, water does not accumulate on the partition plate, and corrosion of the iron plate can be prevented.
In addition, by providing drainage ports at the four corners, even when the power generation device is installed at an angle, the drainage is surely drained by any one of the drainage ports.

Further, the rainwater guide path 137 provided from the drain port 137a in the vertical direction, connecting the lower end of the rainwater guide path 137 and the lower frame 110, so該雨water guide passage 137 is in communication with the outside of the power generation device 101, the drain outlet Since the water on the partition plate that has flowed into the rainwater flows through the rainwater guide passage, it is possible to prevent water from splashing on other components.

Further, since the weir 125 is provided on the radiator 117 side of the drainage port 137a, it is possible to prevent water flowing on the partition plate from getting over the drainage port and being applied to the radiator located immediately after the drainage port.
Further, since the rainwater guide passage 137 has a rainwater guide hole 137c formed in a portion where the rainwater guide passage 137 comes into contact with the bottom plate 142 of the muffler chamber 141, the rainwater or the like also passes over the weir and enters the rear muffler chamber. The rainwater guide passage can flow from the guide hole formed in the guide passage.

Since the muffler chamber bottom plate 142 is inclined downward in the direction of the rainwater guide hole 137c as in claim 2, rainwater or the like passes over the weir and enters the muffler chamber at the rear part even in the rainwater guide passage. It flows on the bottom plate of the muffler chamber inclined toward the bottom, and can flow into the rainwater guide passage from the guide hole drilled in the rainwater guide passage.

  Next, embodiments according to the present invention will be described with reference to the drawings. FIG. 10 is a side view showing the internal configuration of the power generation apparatus 101 of the embodiment, FIG. 11 is a plan view, and FIG. 12 is a rear view. The internal configuration of the power generation apparatus 101 will be described with reference to FIGS. Also in the power generation apparatus 101 in the embodiment, a lower frame frame 200 made of a member having a C-shaped cross-sectional view is disposed in the lower part. The lower frame frame 200 is disposed outside the lower frame 110. Inside the power generation apparatus 101, an engine 111, a generator 112, a fuel tank 113, and a battery 114 are disposed. A generator 112 is connected to the engine 111, and the generator 112 is driven by the output shaft of the engine 111. The engine 111 is disposed in the approximate center of the housing, a generator 112 is disposed on one side, a fuel tank 113 is disposed on the other side, and a battery 114 is disposed above the generator 112.

  In FIG. 10, a partition wall 131 erected in the vertical direction is disposed on the side surface of the housing of the generator 112, and an intake port 108 is further disposed on the side surface of the housing than the partition wall 131. The partition 131 reduces the heat and noise transmitted to the control box 102.

  A fan 121, a radiator 117, and mufflers 122 and 123 are disposed on the fuel tank 113 arrangement side of the engine 111. A guide 124 is disposed above the muffler 122. The guide 124 guides the cooling air generated by the fan 121 to the exhaust outlet 130 side, and is arranged at the upper corner of the power generation apparatus 101. As shown in FIG. 11, the air exhaust port 130 is provided in the approximate center of the upper surface of the power generation apparatus 101. For this reason, in the electric power generation apparatus 101, it can exhaust from the position away from the outer peripheral part, and can reduce the influence which it has on the circumference. Further, on the upper surface of the power generation apparatus 101, a locking portion 109 for suspending the power generation apparatus 101 in the direction opposite to the muffler chamber direction is provided adjacent to the exhaust port 130.

  An air cleaner 116 is disposed above the generator 112, and an intake chamber 115 is disposed slightly above the air cleaner 116. The intake chamber 115 is fixed to the back surface of the ceiling portion of the housing. Intake pipes 134 and 120 are connected to the intake chamber 115. Air is introduced into the intake chamber 115 via the intake pipe 134. Air through the intake chamber 115 is introduced into the air cleaner 116 through the intake pipe 120. The air introduced into the air cleaner 116 is supplied to the engine 111. In the power generation apparatus 101, the engine 111 and the generator 112 are attached to the lower frame 110 via vibration-proof materials. The lower frame 110 is provided with a pedestal for mounting the engine 111 and the generator 112, and the engine 111 and the generator 112 are disposed on the pedestal via vibration isolation materials 127 and 128. For this reason, the vibration transmitted to the lower frame 110 is reduced, and the noise generated from the cover of the power generation apparatus 101 is suppressed.

  Two pipes arranged in the vertical direction are connected to the bottom surface of the intake chamber 115. This pipe connects the intake chamber 115 and the intake pipes 134 and 120. The pipe fixed to the bottom surface of the intake chamber 115 is configured to project a certain amount into the intake chamber 115. By adjusting the amount of protrusion into the intake chamber 115, the frequency characteristics of the intake chamber 115 can be adjusted, and the silencing effect can be improved. The pipe disposed in the intake chamber 115 may be any pipe that connects the intake chamber 115 and the intake pipes 134 and 120, and may be disposed horizontally depending on the internal configuration of the power generation apparatus 101. There is no particular limitation.

  Next, the arrangement configuration of the muffler will be described. The series of mufflers 122 and 123 are configured in an elliptical column shape, and the ellipsoidal surface is arranged on the long side of the power generation device 1 of the power generation device 1 and the radiator side is disposed slightly downward. A series of mufflers 122 and 123 are arranged side by side in the casing. A muffler 122 is disposed above the muffler 123. An exhaust pipe 171 is connected to the exhaust manifold of the engine 111, and the exhaust pipe 171 is connected to the muffler 122. The muffler 122 and the muffler 123 are connected by a pipe 185, and the muffler 123 is connected to a pipe 184 for discharging exhaust gas to the outside of the casing. The exhaust gas of the engine 111 is introduced into the muffler 122 through the pipe 171 and supplied to the muffler 123 through the pipe 185. Then, exhaust gas via the muffler 123 is discharged from the pipe 184.

  In the power generation apparatus 101 configured as described above, the cooling air generated from the fan 121 goes to the radiator 117, passes through the radiator 117, and enters the muffler chamber 141. The bottom plate 142 of the muffler chamber is provided with a stepped portion 142a that is folded in a letter-like shape when viewed from the side. The cooling air is guided by the bottom plate 142 that is bent in a letter-shaped shape and heads upward. The exhausted air is guided between the upper partition wall 118 and the ceiling plate by a T-shaped guide plate 124 disposed above the muffler chamber 141 and is discharged from the exhaust port 130 to the outside of the housing. In this way, the exhaust duct that is bent vertically by combining the muffler chamber, the upper partition wall, and the ceiling plate, can take a wide and long exhaust path, and the power generator itself is compact. It is composed.

  Further, as shown in FIGS. 10 to 12, partition plates 70 and 70 are arranged on the upper partition wall 118 along the exhaust path. The partition plates 70 and 70 are configured in parallel and are erected on the upper partition wall 118. The plurality of partition plates 70 are configured to direct the exhaust air from the corner portion of the power generation apparatus 101 toward the exhaust port 130 and to mute the sound. A sound absorbing material is affixed to the partition plate 70 to reduce noise transmitted through the exhaust path. The partition plate 70 is disposed in a direction along the exhaust air path (parallel to the exhaust air), but may be disposed obliquely with respect to the exhaust air. The leakage of engine noise can be reduced by increasing the projected area with respect to the flow direction of the exhaust air, and the exhaust resistance can be reduced by arranging the exhaust air along the direction of the exhaust air. In other words, it is possible to adjust the cooling air exhaust efficiency and noise reduction by the partition plate 70 disposed on the upper partition wall 118. Further, the silencing effect can be improved while suppressing the exhaust resistance.

  A radiator maintenance window 135 is provided above the radiator 117 so that the radiator can be easily maintained. A cover is attached to the maintenance window, and if the window is normally closed with the cover, noise will not leak from the window to the outside of the power generator.

  Next, the configuration of the upper partition wall 118 of the power generation apparatus 101 will be described in detail below. The upper partition wall 118 is disposed between the engine 111 and the exhaust port 130. Thereby, the noise generated from the engine 111 does not directly go out of the power generation apparatus 101 from the exhaust port 30. The upper partition wall 118 is provided so as to be inclined obliquely downward from the gap between the locking portion 109 and the discharge port 130 toward the right side of the sheet of the power generator 101. The upper partition wall 118 is bent once in the middle, and then bent again, and the final folded surface is a horizontal plane. The reason why the upper partition wall 118 is bent in this manner is to reduce the wind exhaust resistance. Note that if at least one or more bent portions are provided, the wind resistance can be reduced, and the present invention is not limited to providing two bent portions as shown in the embodiment.

  Further, drainage ports 137a are formed at the front, rear, left and right corners of the horizontal plane, and a rainwater guide passage 137 is provided in the vertical direction below the drainage port 137a. A drainage outlet at the lower end of the rainwater guide passage 137 is provided. 137b communicates with the outside of the fuselage. The lower end of the rainwater guide passage 137 is connected to the upper part of the lower frame frame 200, and a drain outlet 137 b is formed at the upper part of the lower frame frame 200. Note that the four cylindrical rainwater guide passages 137 provided in the vertical direction serve as reinforcing members that support the power generation apparatus 101. Therefore, there is no need to separately provide a member such as the reinforcing member 61 shown in the previous embodiment.

  In such a configuration, rainwater flows up to the horizontal plane along the inclination of the upper partition wall 118, flows into the rainwater guide passage 137 from the drain outlets 137a provided at the four corners of the horizontal plane, and from the drain outlet 137b at the lower end of the rainwater guide passage. It is discharged outside the aircraft. In addition, in order to prevent rainwater or the like that has fallen along the upper partition wall 118 from passing over the rainwater guide passage 137 and entering the radiator 117 or the like located immediately behind, the upper end portion of the rear surface of the rainwater guide passage 137 on the radiator 117 side. Is provided with a weir 125.

  A guide hole 137c is formed in a portion of the rainwater guide passage 137 where the muffler chamber bottom plate 142 abuts. Even when water gets over the weir 125 and enters the muffler chamber 141 at the rear, it can flow into the rainwater guide passage 137. Since the muffler chamber bottom plate 142 is inclined downward toward the guide hole direction, the water flowing into the muffler chamber flows along the bottom plate 142 inclined toward the guide 137c hole direction. And it is received by the level | step difference 142a provided in the bottom plate 142 once, and flows into the rainwater guide channel | path 137 from the guide hole 137c.

  Next, a method for fixing the sound absorbing material disposed in the housing will be described with reference to FIGS. As shown in FIG. 15, the conventional guide 124 is screwed to the housing with a screw 143 from the outside of the housing, and the sound absorbing material 136 is pasted with an adhesive or the like. Although this method is easy to work, there is a possibility that peeling will occur particularly at a site where the weight of the sound-absorbing material is applied to the adhesive surface due to the deterioration of the adhesive due to the impact during transportation and the severe usage environment. Therefore, as shown in FIG. 16, folded portions 124a bent in a “U” shape in cross section are formed at the upper and lower ends, the left and right ends, or the four ends of the guide 124 formed of a plate body such as a steel plate. is there. The folded portion 124 a has a length of the guide 124 that is longer than the length of the sound absorbing material 136 by at least the thickness t so that the end of the sound absorbing material 136 is hooked. Further, it is further bent at the position of thickness t from this bending position, and a folded portion 124a having a “U” shape in cross section is provided.

  By comprising in this way, the sound-absorbing material 136 is fixed by an adhesive and is locked by the folded portion 124a, so that the reliability with respect to peeling is improved as compared with the case where it is stuck using only the adhesive. There are other methods such as fixing the sound absorbing material with a fixed rib in the middle as in the past, or fixing with a pin. The area is reduced and the soundproofing effect is reduced. Moreover, when fixing with a pin, the sound-absorbing material around the plate portion of the pin is compressed, and the soundproofing effect of this part is lowered. In the case where the sound absorbing material is fixed with the mounting bracket having the folded portion, the portion of the returning portion that covers the sound absorbing material is limited to the end portion of the sound absorbing material, and the soundproofing effect is not lowered.

  Moreover, as shown in FIG. 14, the case where the sound-absorbing material 138 to be attached to the side surface of the housing is fixed by a metal fitting 139 having a folded portion will be described with reference to FIGS. First, the embodiment in FIG. 17 will be described. The mounting bracket 139 has a plate bent in a crank shape in cross section, and has a fixing portion 139b to the flat housing and a pressing portion 139c of the sound absorbing material 138 so that the sound absorbing material 138 is not displaced from the pressing portion 139c. In addition, hook portions 139a, 139a,... Are provided so that the adhesive material is deteriorated and the sound absorbing material 138 is not peeled off. The catching part 139a uses a burr, and when a hole is drilled using a punch or a drill, a burr is generated. However, the burr is usually removed because it causes an injury or a damage to the product. In this configuration, on the contrary, burrs are effectively used, and the gap between the punch and the die when drilling is made as large as possible so that large burrs are generated. By opening a large number of these holes, the number of hooks 139a, 139a,... Can be increased and the sound absorbing material 138 can be reliably hooked and fixed. And since the exposed part of the sound absorbing material 38 is also increased, the sound absorbing effect is also improved.

  The mounting bracket 157 configured as shown in FIG. 18 has a steel plate bent in a “U” shape, and has a fixing portion 157a to the casing and a pressing portion 157b of the sound absorbing material 38, and the hooking portion 157c is attached to the pressing portion 157b. Forming. The catching portion 157c has a pointed portion between the notches 157d and 157d by forming a notch 157d at the end side of the pressing portion 157b by processing such as a circular punch and overlapping the notches 157d and 157d. This pointed portion is bent when pressed during shearing to form a catching portion 157c. By providing a large number of the hooks 157c, the sound absorbing material 138 is locked without being displaced, and the sound absorbing effect can be improved by exposing the sound absorbing material in the notch 157d portion. The mounting bracket 158 having the configuration shown in FIG. 19 has a steel plate bent in a cross-sectional hat shape, and has a fixing portion 158a to the housing and pressing portions 158b and 158b of the sound absorbing material 138. The hooking portion 158c is attached to the pressing portion 158b. Forming. The hook portion 158c has a triangular shape or a quadrangular shape, whereas the punch has a circular shape, and forms a hook portion 158c. In this case, the sound absorbing material 138 can be pressed and attached to both sides of the mounting bracket 158. The mounting brackets 139, 157, and 158 are limited in cross-sectional shape as long as they have a U-shape or can have a return portion on one side or both sides and have a folded portion. is not. The shape of the punch is not limited as long as it can be cut into a circular shape or a combination of square shapes to form a pointed portion.

  By adopting such a configuration, the sound absorbing material is held by the mounting bracket and hooked, so that it is securely fixed inside the housing by using it together with the adhesive, and the exhaust efficiency and soundproofing are reduced. Is improved, and the reliability required for a portable soundproof power generator with many opportunities for use on the road is improved.

  Next, with reference to FIGS. 10, 16 and 17, the intermediate strut in the soundproof type power generator having a structure in which the space between the partition plate and the ceiling slab is an exhaust duct will be described.

  As shown in FIG. 10, the exhaust duct at the top of the casing from the guide 124 to the exhaust outlet 130 has a wide and long exhaust passage so that the sound energy is reduced while keeping the exhaust resistance low. Noise can be reduced efficiently. On the other hand, having a large space without a structure in the upper part of the housing has a problem that the strength when an external force is applied to the upper part of the housing is lower than other parts. In particular, soundproof power generators are often transported and used, and when stored, there are cases where they are stored in two or three stages. As a result, it may become impossible to store in the stacked state, the exhaust path of the exhaust duct portion becomes narrow, exhaust efficiency may decrease, and the sound absorbing material may be peeled off.

  Therefore, as shown in FIG. 13, a space between the ceiling plate constituting the upper part of the soundproof cover of the power generation device 1 and the upper partition wall 118 is used as an exhaust duct, and at least one is provided in the middle of the exhaust duct. The above intermediate strut 140 is erected. The intermediate strut 140 is erected along the side wall so as not to resist exhaust air. In this configuration, a radiator partitioning stay 166 is screwed to the inner wall of the housing that houses the engine 111, and the radiator partitioning stay is fixed. Reference numeral 166 indicates that the upper portion and the lower portion are connected to the radiator mounting portion to increase the strength. An intermediate column 140 is provided on the upper extension of the radiator partition stay 166. Thus, the strength of the upper part of the housing is improved.

  Further, since the sound absorbing material is also affixed to the inner wall of the exhaust duct, the intermediate strut 140 can use the fixing member of the sound absorbing material having the folded portion shown in FIGS. 17 to 19 as the intermediate strut. . In this case, the exhaust duct is reinforced and the mounting member for the sound absorbing material is used, and the number of parts can be reduced.

  Another structure of the soundproof type power generation device will be described with reference to the drawings. 1 is a perspective view of the power generator 1, FIG. 2 is a side view showing the internal configuration of the power generator 1, FIG. 3 is also a rear view, FIG. 4 is a front view showing the configuration of the door 5, and FIG. FIG. 6 is a view showing the assembly structure of the open / close door 5, FIG. 7 is a view of the upper partition wall 18 as viewed from above, FIG. 8 is a side view, and FIG. 9 is a front view.

  First, the overall configuration of the power generator will be described with reference to FIGS. 1 to 3. The power generation device 1 is provided with a frame 10 at the bottom, and the components of the power generation device 1 are provided on the lower frame 10. A soundproof cover is mounted on the lower frame 10 to improve the soundproofing effect. In the power generation device 1, the lower frame 10 and the soundproof cover constitute a housing of the power generation device 1. The power generator 1 is provided with a control panel 2 and a power outlet 3 on the side surface on the short side, and open / close doors 4 and 5 are provided on the side surface on the long side. The control panel 2 controls the power generator 1 and displays the operation state. And the electric power generated in the power generator 1 is taken out by connecting a wire to the power outlet 3.

  The open / close doors 4 and 5 are configured to open symmetrically from the center to the left and right sides. Thereby, the opening amount in the side surface of the electric power generating apparatus 1 can be taken large, and maintainability can be improved. In addition, intake ports 6, 7, 7 b and a fuel display window 8 are provided on the side surface on the long side of the power generator 1. At the upper part of the power generation device 1, a locking portion 9 for suspending the power generation device 1 is provided. A reinforcing member 61 is disposed in the locking portion 9 in the vertical direction. The reinforcing member 61 is connected to the lower frame 10 from the upper part of the power generator 1.

  An engine 11, a generator 12, a fuel tank 13, and a battery 14 are disposed in the power generator 1. A generator 12 is connected to the engine 11, and the generator 12 is driven by the output shaft of the engine 11. A battery 14 is disposed on the side of the generator 12, and a fuel tank 13 is disposed above the generator 12. In FIG. 2, a partition wall 32 that partitions the generator 12 and the fuel tank 13 is disposed in the horizontal direction. A shielding plate 25 is disposed on the left side of the fuel tank 13 to reduce the noise of the engine 11 transmitted to the control box 26 side. The partition wall 32 also serves as a support for the fuel tank 13. On the right side of the engine 11, a fan 21, a radiator 17, and mufflers 22 and 23 are disposed. A guide 24 is disposed above the muffler 22. The guide 24 guides the cooling air generated by the fan 21 to the air outlet 30 and is disposed at the upper corner of the power generator 1. The guide 24 is configured in a T shape as shown in FIG. 2, and is arranged from the front side of the paper toward the back direction. Further, a sound absorbing material is affixed to the guide 24 to improve the silencing effect. The air exhaust port 30 is provided substantially at the center of the upper surface of the power generation device 1. For this reason, in the electric power generating apparatus 1, it can exhaust from the position most distant from an outer peripheral part, and can reduce the influence which it has on the circumference | surroundings.

  An air cleaner 16 is disposed above the engine 11, and an upper partition wall 18 is disposed above the air cleaner 16. The upper partition wall 18 is disposed between the engine 11 and the exhaust port 30. As a result, noise generated from the engine 11 does not directly go out of the power generation apparatus 1 through the exhaust port 30. The air cleaner 16 is attached to the stay 35 shown in FIG. An intake chamber 15 is disposed on the lower surface of the upper partition wall 18, and air is introduced into the intake chamber 15 via an intake pipe 34. The intake chamber 15 is connected to an air cleaner 16, and air is supplied to the air cleaner 16 through 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 and the generator 12 are attached to the lower frame 10 via a vibration isolator. The frame 10 is provided with a pedestal for mounting the engine 11 and the generator 12, and the engine 11 and the generator 12 are disposed on the pedestal via vibration isolating materials 27 and 28. For this reason, the vibration transmitted to the cover of the power generator 1 is reduced and noise is suppressed.

  An intake port and an exhaust port are provided in the upper part of the engine 11, and a central part of the engine 11 is constituted by a cylinder block and a crankcase of the engine 11. The cylinder block accommodates the piston inside and has a cooling water path inside. The crankcase supports the crankshaft. For this reason, the cylinder block and the crankcase are highly rigid. For this reason, in the vicinity of the engine 11, the engine noise is relatively small on the side of the cylinder block in the center of the engine. An oil pan 29 is provided below the engine 11. A drain 33 is connected to the oil pan 29, and the 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 open / close door 5 is configured to be freely opened and closed on the side surface of the power generation device 1. As shown in FIG. 4, an opening 7 is provided in front of the open / close door 5, and air is introduced into the power generation apparatus 1 through the opening 7. Hinges 41 and 41 are fixed to the side end portions of the opening and closing door 5, and are configured to be openable and closable around the hinges 41 and 41. Further, a handle portion 44 is provided on the side opposite to the side on which the hinge 41 is disposed, and the opening / closing door 5 is opened and closed by the handle portion 44. The open / close door 5 is mainly composed of a front surface portion 42 and an intake duct 43. The front portion 42 constitutes the front of the open / close door 5 and is located on the outer surface of the power generator 1. As described above, the air inlet 7 is provided in the lower portion of the front portion 42 on the side where the hinge 41 is provided. An intake duct 43 is attached to the rear surface of the front portion 42.

  The intake duct 43 is fixed to the front surface portion 42 with a fastener such as a bolt. The rear surface of the intake duct 43 (the surface located inside the power generation device) is configured to be flat, and has a structure with little protrusion into the power generation device. A plate 49 is formed in the intake duct 43, and the plate 49 of the intake duct 43 and the front surface portion 42 are fixed by a fastener. The intake duct 43 is configured to be removable from the front surface portion 42. The intake duct 43 is provided with an outside air outlet 45, and the air introduced from the air inlet 7 of the front surface portion 42 is introduced into the power generator 1 from the outside air outlet 45.

  Sound absorbing materials 46, 47, and 48 are disposed between the front portion 42 and the intake duct 43. The sound absorbing material 46 is disposed on the back surface of the front surface portion 42. In the sound absorbing material 46, a portion corresponding to the air inlet 7 is cut away, and the sound absorbing material 46 does not hinder the introduction of air from the air inlet 7. Further, the sound absorbing material 46 has a configuration in which a portion corresponding to a bolt mounting portion for attaching the intake duct 43 to the front surface portion 42 is cut out, and the intake duct 43 is securely attached to the front surface 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 adsorbing material 48 is provided on the inner front surface of the intake duct 43. The portion of the adsorbent 48 on the outside air outlet 45 side is configured such that a portion overlapping the outside air outlet 45 is cut out.

  The intake duct 43 is fixed to the back surface of the front portion 42 and is integrally formed with the open / close door 5. Thereby, the freedom degree of the arrangement position of the inlet port 7 and the arrangement position of the outside air outlet 45 can be improved, and it can provide easily in the position with few noises in a generator. The position where the noise is low in the power generator 1 can be reduced by disposing the engine at a position where the engine noise is low, a position where the generator noise is low, a position where the generator cooling noise is low, and the like. . Further, the intake duct 43 is fixed to the open / close door 5, whereby the rigidity of the open / close door 5 is improved and noise from the side portion of the power generator 1 can be reduced. Further, the rear surface of the intake duct 43 is flat, and the number of parts and the number of attaching steps of the sound absorbing material to be attached to the inside of the intake duct 43 can be reduced. Furthermore, the length of the intake path in the intake duct 43 can be increased, and the sound absorption effect can be improved. The opening / closing door 5 becomes a double partition, and the sound insulation effect is enhanced. Similarly, in the open / close door 4, noise can be reduced by introducing the air inlet 7 b into the housing of the power generation apparatus 1 through a duct arranged on the inner surface of the open / close door 4.

  Next, the configuration of the upper partition wall 18 will be described with reference to FIGS. The upper partition wall 18 is disposed on the upper portion of the engine 11 from one side surface to the opposite side of the power generation device 1. The upper partition wall 18 is connected to the radiator mounting portion 65 and the reinforcing member 61. That is, the space between the ceiling plate constituting the upper part of the soundproof cover of the power generator 1 and the upper partition wall 18 is used as an exhaust duct. Thereby, in the electric power generating apparatus 1, the exhaust path which utilized the inner surface of the soundproof cover can be comprised, and noise can be reduced, making the electric power generating apparatus 1 compact. Further, the engine room and the exhaust air flow path downstream from the radiator 17 can be reliably separated, and the cooling effect can be improved. An intake chamber 15 is connected to the lower surface of the upper partition wall 18, and a guide 51 is disposed on the upper surface. The guide portion of the guide 51 extends toward the air outlet 30, and the guide 51 is disposed in a direction perpendicular to the air exhaust path. The guide 51 serves as a baffle plate for noise passing over the upper partition wall 18, and when the sound wave of noise hits the guide 51, the sound wave is dispersed and the silencing effect is improved. Furthermore, a sound absorbing material is attached to the exhaust path side (exhaust path side) of the guide 51, and thereby a further silencing effect can be obtained. Moreover, as an arrangement structure of the guide 51, it is also possible to make it horizontal in addition to the oblique direction with respect to the exhaust path as described above.

  The intake chamber 15 is provided with a lower pipe 54 and a side pipe 53 that communicate with the inside and outside of the intake chamber 15. In the intake chamber 15, a plurality of partition plates 52, 52,. A lower pipe 54 is disposed on the bottom surface of the intake chamber 15. An 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 disposed on the side surface of the intake chamber 15. The air cleaner 16 is connected to the side pipe 53. The lower pipe 54 and the side pipe 53 are configured to protrude into the intake chamber 15 by 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 silencing 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 intake chamber 15 and is configured to be connected to alternately facing inner surfaces. As a result, the intake path in the intake chamber 15 is lengthened, a maze is formed, and the sound absorption effect can be improved.

  The radiator 17 is connected to the radiator mounting portion 65 at the upper portion and is connected to the radiator mounting portion 62 at the lower portion. A guide plate 63 is fixed to the upper portion of the radiator mounting portion 62. The guide plate 63 is configured in a letter-like shape when viewed from the side, and directs exhaust air discharged through the radiator upward. The exhaust air directed upward by the guide plate 63 is directed toward the upper partition wall 18 by the guide 24 disposed at the corner portion of the casing of the power generator 1. The exhaust air passing over the upper partition wall 18 is directed to the exhaust air outlet 30 by the guide plate 64 disposed in the vicinity of the locking portion 9. The guide plate 64 is disposed on the downstream side of the exhaust air in the upper partition 18 and is disposed obliquely with respect to the upper partition 18. Thereby, the silencing effect can be improved while reducing the exhaust resistance. A seal member such as a weather strip is attached to the upper end of the guide plate 64 to prevent the noise of the engine 11 from leaking between the guide plate 64 and the soundproof cover and to allow rainwater and dust to enter. Is to prevent.

  Since the present configuration is configured as described above, the cooling air generated from the fan 21 passes through the radiator 17, is directed upward by the guide plate 63, and passes through the muffler chamber in which the mufflers 22 and 23 are disposed. Then, it is directed to the upper partition wall 18 side by the guide 24 disposed at the corner portion of the casing of the power generator 1, passes over the upper partition wall 18, and is discharged from the exhaust port. In this way, the exhaust duct that is bent vertically by combining the muffler chamber, the upper partition wall, and the ceiling plate, can take a wide and long exhaust path, and the power generator itself is compact. It is composed.

The perspective view of the electric power generating apparatus 1. FIG. FIG. 3 is a side view showing the internal configuration of the power generation device 1. Similarly rear view. The front view which shows the structure of the opening-and-closing door 5. FIG. Similarly side cutaway view. The figure which shows the assembly structure of the opening-and-closing door 5. FIG. The figure which looked at the upper partition 18 from the top. Similarly side view. Similarly front view. The side view which shows the internal structure of the electric power generating apparatus 101 of an Example. FIG. Similarly rear view. The side view of the electric power generating apparatus 101. FIG. Similarly rear view. The sectional side view of the guide 124 which stuck the sound-absorbing material with the adhesive agent. The sectional side view of the guide 124 which fixed the sound-absorbing material by the return part 120. The figure which shows the structure of the fixture which fixes a sound-absorbing material to the housing | casing side surface. The figure which shows the structure of the fixture which fixes a sound-absorbing material to the housing | casing side surface. The figure which shows the structure of the fixture which fixes a sound-absorbing material to the housing | casing side surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power generation device 5 Opening / closing door 11 Engine 12 Generator 15 Intake chamber 17 Radiator 18 Upper partition 21 Fan 24 Guide 30 Air outlet 61 Reinforcement member 64 Guide plate 101 Power generation device 111 Engine 112 Generator 115 Intake chamber 117 Radiator 118 Upper partition 120 Return Part 121 Fan 124 Guide 125 Weir 130 Ventilation outlet 135 Radiator maintenance window 136/138 Sound absorbing material 140 Intermediate strut 141 Muffler chamber 142 Bottom plate 146/147/148 Sound absorbing material

Claims (2)

A soundproof type power generating device provided with a cooling air intake for cooling the engine (111) and the generator (112) on the side plate of the soundproof case, and provided with a wind duct in the soundproof case above the engine (111), The exhaust duct (130) of the exhaust duct is provided in the ceiling plate of the soundproof case, and an exhaust duct bent vertically from the exhaust duct is also provided on the side of the radiator (117) of the engine (111). In the configuration in which the muffler (122) is provided in the exhaust duct, the radiator (117) is disposed between the ceiling plate of the soundproof case that opens the exhaust port (130) and the upper surface of the engine (111). An upper partition wall (118) inclined downward is provided, a drain port (137a) is provided at an end of the upper partition wall (118) on the radiator (117) side, and a radiator (117) of the drain port (137a) is provided. On the side A weir (125) is provided, a rainwater guide passage (137) is provided in the vertical direction from the drain port (137a), a lower end of the rainwater guide passage (137) is connected to the lower frame (110), and the rainwater guide passage (137 ) Leads to the outside of the power generation device (101), and the rainwater guide passage (137) is in contact with the bottom plate (142) of the muffler chamber (141) so that the water passes over the weir (125) and the rear muffler. A soundproof type power generator characterized in that a rainwater guide hole (137c) that can flow into the rainwater guide passage (137) even if it has entered the chamber (141) . The soundproof type power generator according to claim 1, wherein the muffler chamber bottom plate (142) of the portion with which the rainwater guide passage (137) abuts is inclined downward toward the rainwater guide hole (137c). A soundproof power generation device.

Images