JPH10317983A - Casing structure for power generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the total length of a power generation device by providing it with an exhaust gas emission part for promoting the mixture of a ventilation flow and an exhaust gas flow and lowering the exhaust gas temperature while the engine is halted. SOLUTION: A casing structure for a power generation device comprises a casing for covering a power generation device totally, and a box 8 disposed inside an outer plate 1 so as to form a double structure with the plate 1 for covering an engine, a muffler, a generator and the like. The casing structure involves an opening 7 formed through one side of the plate 1, a rectangular framing ventilation outlet 8A formed through the box 8 onto the inner periphery of the opening 7 to emit a ventilation flow, and a rectangular framing exhaust gas outlet 9A on an exhaust pipe 9 situated within the inner periphery of the ventilation outlet 8A to emit an exhaust gas flow. That casing structure further comprises a rectangular framing guide member 21 with an inner periphery spreading radially outward toward the end, which guide member is fixed in the opening 7 with its outer periphery coupled onto the ventilation outlet 8A and encircling the end of the exhaust gas outlet 9A at an interval therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer box structure of a power generator using a gas turbine engine, a reciprocating engine or the like as a power source, and more particularly, to a structure of an exhaust gas discharge portion.

[0002]

2. Description of the Related Art FIGS. 6 to 8 show a structure of an exhaust gas discharging portion provided in an outer case of a conventional power generating device. In FIG. 6, reference numeral 1 denotes an outer plate of an outer box 10 of the power generator.
An operation panel 2 provided with a power terminal, a start / stop switch, and the like is provided on the outer case 10. The lower part of the outer case 10 is provided with a leg 3 for supporting the power generator, and the upper part of the outer case 10 is provided with a fuel cap 4 for closing a fuel supply port of the engine.

[0005] Handles 5 are gripped when the power generator is carried, and are provided on both sides of the upper end of the side surface of the outer box 10. Toride 5
The outer plate 1 around the handle 5 is provided with a recess 6 so that the hand holding the handle 5 does not hit the outer plate 1. 7 is an outer plate 1 immediately below the handle 5
It is an opening of the exhaust gas discharge part opened on the side.

Next, FIGS. 7 to 7 show the structure of the exhaust gas discharge section.
In FIG. 8, reference numeral 8 denotes a box which is located inside the outer box 10 and covers the engine 11, the muffler 13 and a generator (not shown), and forms a double structure with the outer box 10. A ventilation flow generated by a cooling fan (not shown) flows inside the box 8 to cool the generator, the engine, and the muffler. A rectangular cylindrical ventilation outlet 8A of the box 8 is located on the inner peripheral side of the opening 7. Reference numeral 9 denotes a rectangular frame-shaped exhaust pipe for discharging the exhaust gas flow from the engine, and 9A denotes a rectangular cylindrical exhaust outlet of the exhaust pipe 9 arranged on the inner peripheral side of the ventilation outlet 8A. The exhaust pipe 9 is connected to the engine 11 by a duct 14, a muffler 13, and a joint duct 12. The exhaust outlet 9A of the exhaust pipe 9 and the ventilation outlet 8A of the box 8 both protrude outward from the outer box 10, but the exhaust outlet 9A is configured to protrude outward more greatly than the ventilation outlet 8A. In the above configuration, when the engine is running, as shown in FIG. 7, the ventilation flow that has cooled the generator, the engine, and the muffler and has become high temperature flows straight outward as indicated by a white arrow, and the inside flows from the engine inside. The discharged exhaust gas flow flows straight outward as indicated by the black arrows. They do not mix with each other at the opening 7.

Next, when the engine is stopped, as shown in FIG. 8, since the cooling fan stops, the ventilation flow flows upward from the ventilation outlet 8A of the box 8 in the direction shown by the white arrow, and the exhaust gas flow Also flows upward from the exhaust outlet 9A of the exhaust pipe 9 in the direction indicated by the black arrow. At this time, the ventilation flow and the exhaust gas flow hardly mix with each other, but since the rectangular cylindrical ventilation outlet 8A and the exhaust outlet 9A protrude outward beyond the outer plate, the ventilation flow and the exhaust gas flow can be reduced by the handle 5 or the outside. Board 1
As a result, the temperature does not rise so that the handle 5 is not touched by hand, and a part of the outer plate 1 is not burned.

In addition, since the exhaust outlet 9A protrudes outward from the ventilation outlet 8A, the high-temperature exhaust gas flow from the exhaust outlet 9A does not flow into the box from the ventilation outlet 8A and does not cause heat damage.

[0007]

However, in the structure of the conventional exhaust gas exhaust portion, the ventilation outlet 8A of the box 8 projects outward from the outer plate 1 and further has the exhaust pipe 9A.
The exhaust outlet 9A has a structure that protrudes more greatly from the ventilation outlet 8A, and therefore, there is a problem that the total length of the power generation device becomes longer.

The present invention has been proposed to solve this problem, and an object of the present invention is to improve the exhaust gas flow discharge portion to shorten the overall length.

[0009]

According to the first aspect of the present invention, there is provided an outer case for covering an entire power generation device, and an outer case provided inside the outer case for covering an engine, a muffler, a generator, and the like. A box forming a double structure, a ventilation outlet for discharging a ventilation flow inside the box disposed in an opening formed on the side of the outer box, and an exhaust pipe disposed on an inner peripheral side of the ventilation outlet for discharging an exhaust gas flow. In a power generator having an exhaust gas exhaust portion comprising an exhaust outlet, a frame-like guide member projecting a predetermined amount outward from the outer box is fitted into the opening, and this guide member is joined to the ventilation outlet, The inner peripheral surface surrounds the outer peripheral end portion of the exhaust outlet with a predetermined gap, and at least the inner peripheral surface upper surface is formed so as to expand outward. According to a second aspect of the present invention, in the first aspect of the present invention, the center position of the exhaust outlet is disposed below the center position of the guide member.

According to a third aspect of the present invention, the outer case covers the entire power generating device, and the inner case is provided inside the outer case to cover the engine, the muffler, the generator, and the like, and forms a double structure with the outer case. Exhaust gas comprising a box, a ventilation outlet for discharging a ventilation flow inside the box disposed in an opening opened on the side of the outer box, and an exhaust outlet of an exhaust pipe disposed on an inner peripheral side of the ventilation outlet for discharging an exhaust gas flow. In the power generating apparatus provided with the discharge part, the inner peripheral surface is joined to the ventilation outlet, the inner peripheral surface surrounds the outer peripheral end portion of the exhaust outlet with a predetermined gap, and at least the inner peripheral surface upper surface is formed to diverge outward. A frame-shaped mixing member, and a frame-shaped discharge member that surrounds the outer periphery of the mixing member with a predetermined gap, and that has at least an inner peripheral surface upper surface flared outward. And projecting more outward than the outer box It was. According to a fourth aspect of the present invention, in the third aspect of the present invention, the center position of the exhaust outlet is located below the center position of the mixing member.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, a flange is provided on the outer peripheral surface of the mixing member, and the flange is sandwiched between a side surface of the spacer of the heat shielding material and a side surface of the discharge member. It was fixed to the opening of the outer box.

According to a sixth aspect of the present invention, in the third or fourth aspect, the mixing member is fixed to an exhaust pipe by a stay.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the present invention, the angle of inclination of the upper surface of the inner peripheral surface formed to be divergent outside the guide member or the discharge member is determined. The exhaust gas flow can always be led to the outside by setting the inclination angle to be greater than that at which the device can be installed.

[0014]

According to the first aspect of the present invention, the guide member reduces the temperature of the exhaust gas flow while mixing the ventilation flow and the exhaust gas flow when the engine is stopped. And the total length of the power generation device can be shortened by reducing the amount of protrusion of the exhaust gas discharge portion from the outer plate without being exposed to the exhaust gas.

According to the second aspect of the present invention, since the ventilation flow that collides with the exhaust gas flow when the engine is stopped can be increased, the temperature of the exhaust gas flow can be rapidly reduced. According to the third aspect of the present invention, since the mixing member and the discharge member are separately provided in the opening, the mixing of the exhaust gas flow and the ventilation flow can be further promoted, and the temperature can be rapidly lowered.

According to the fourth aspect of the present invention, since the ventilation flow colliding with the exhaust gas flow can be increased, the temperature of the exhaust gas flow can be rapidly reduced.

According to the fifth aspect of the present invention, since the spacer made of the heat shielding material is provided, the degree to which the heat of the mixing member heated by the high temperature exhaust gas flow is transmitted to the outer box can be reduced.

According to the sixth aspect of the present invention, since the outer box is not in contact with the mixing member, the heat of the mixing member heated by the high-temperature exhaust gas flow is not conducted to the outer box.

According to the seventh aspect of the present invention, the exhaust gas flow can be reliably discharged to the outside.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in FIGS. The same parts as those in the conventional structure will be described with the same numbers.

FIG. 1 shows a first embodiment. In FIG. 1, reference numeral 10 denotes an outer box which covers the entire power generating apparatus.
The outer plate 1 around the handle 5 is provided with a recess 6. A rectangular opening 7 is opened on the side surface of the outer box 10 immediately below the handle 5.

Reference numeral 8 denotes a box, which covers the engine 11, the muffler 13 and a generator (not shown) inside the outer box 10 to form a double structure with the outer box 10. A ventilation flow generated by a cooling fan (not shown) flows inside the box 8, and cools the generator, the engine, and the silencer. In order to discharge this ventilation flow, a rectangular ventilation outlet 8A of the box 8 is arranged on the inner peripheral side of the opening 7. Further, an exhaust outlet 9A of a rectangular exhaust pipe 9 for discharging an exhaust gas flow from the engine is arranged on the inner peripheral side of the ventilation outlet 8A. The exhaust pipe 9 is connected to the engine 11 by a duct 14, a muffler 13, and a joint duct 12.

Next, the structure of the exhaust gas discharge part which is a main part of the present invention will be described.

Reference numeral 21 denotes a rectangular frame-shaped guide member. The guide member 21 is fixed by pushing the fitting portion 22 until it hits the stepped portion 7A of the opening 7. Rectangular frame-shaped outer peripheral surface 21
A is joined to the end of the ventilation outlet 8A of the box 8, and the inner peripheral surface 21B surrounds the outer peripheral end of the exhaust outlet 9A with a predetermined gap.

The center of the guide member 21 is located at the exhaust outlet 9.
A ventilation flow may be increased by being arranged above the center position of A.

The inner peripheral surface 21B of the guide member 21 is formed so as to be divergent toward the outside as a whole, and is made of a heat-resistant resin such as a heat-resistant resin so that it does not melt even when hit by a high-temperature exhaust gas flow discharged from the exhaust outlet 9A. Made of a material with low thermal conductivity. The end of the exhaust outlet 9A is located inside the guide member 21 so as not to protrude outward from the outer box 10, whereas the guide member 2
The tip of 1 protrudes outward from the outer box 10 by a predetermined amount.

The purpose can be achieved even if the inner peripheral surface 21B of the guide member 21 is formed so that only the upper surface of the inner peripheral surface is outwardly divergent.

In this case, the divergent inclination angle is set to be equal to or greater than the inclination angle at which the power generator can be installed, so that the exhaust gas flow can be reliably discharged to the outside. That is, the exhaust gas flow coming out of the exhaust outlet 9 </ b> A is set so as to surely hit the guide member 21 even at the time of the maximum inclination of the power generator.

Reference numeral 23 denotes an annular notch for cooling provided on the inner peripheral side of the fitting portion 22. By increasing the notch 23, heat of the guide member 21 is transmitted from the opening 7 to the outer plate 1. The degree can be reduced.

The guide member 21, the exhaust outlet 9A,
The ventilation outlet 8A and the opening 7 may be cylindrical instead of rectangular.

The operation will be described next. During operation of the engine, the ventilation flow generated by the cooling fan, which has cooled the generator, engine, and silencer and has become high temperature, flows straight outward from the ventilation outlet 8A in the axial direction of the opening 7 and continuously from the engine. The exhaust gas flows discharged from the exhaust outlet 9A also flow straight outward in the axial direction of the opening 7, so that they do not cross each other.

When the engine stops, the engine,
Since both the cooling fan stops, the flow of the ventilation flow and the exhaust gas flow stops. However, as shown in FIG. 1, the remaining ventilation flow is indicated by a white arrow from the ventilation outlet 8A, and the exhaust gas flow is black by the exhaust outlet 9A. As shown by the arrows, the air is discharged while changing the flow upward. At this time, the exhaust gas flow and the ventilation flow collide and mix inside the guide member 21.

Since the ventilation flow has a lower temperature than the exhaust gas flow,
While flowing while mixing at the divergent portion of the guide member 21, the entire temperature gradually decreases, and becomes a temperature at which there is no adverse effect even when discharged outside. Thus, the temperature of the handle 5 and the outer plate 1 can be prevented from becoming high.

Moreover, since the guide member 21 is projected outwardly from the outer plate 1 by an appropriate amount, the exhaust gas flow does not directly contact the handle 5 or the outer plate 1.

FIGS. 2 and 3 show a second embodiment.

Referring to FIGS. 2 and 3, the structure of the exhaust gas discharge portion of this embodiment will be described. Reference numeral 31 denotes a rectangular frame-shaped mixing member provided with a flange 34 on the outer peripheral surface. Mixing member 3
Numeral 1 surrounds the outer peripheral end of the exhaust outlet 9A with a predetermined gap, and the inner peripheral surface 31B is formed so as to diverge outward as a whole. The outer peripheral surface 31A of the mixing member 31 is joined to the end of the ventilation outlet 8A.

Numeral 33 denotes a member arranged on the outer periphery of the mixing member 31.
This is a rectangular frame-shaped discharge member made of a material having a low thermal conductivity, for example, a heat-resistant resin such as fiber-reinforced nylon or the like, and formed so that the inner peripheral surface 33B is formed to diverge outward as a whole. The mixing member 31 and the discharge member 33 correspond to the guide member 21 in FIG.

Numeral 32 is the same rectangular spacer as the discharge member 33. The flange 34 is fitted to the opening 7 of the outer plate 1 by sandwiching the flange 34 between the side surface of the spacer 32 and the side surface of the discharge member 33,
It pushes in until it hits the stepped part 7A of the opening 7, and as shown in FIG. The spacer 32 is made of a heat shielding material so that the heat of the mixing member 31 heated by the high temperature exhaust gas flow is not transmitted to the outer plate 1 via the flange 34. The end of the exhaust outlet 9A is the mixing member 3
1 so that it does not protrude outward.
1 does not protrude outward from the discharge member 33, and the discharge member 33 protrudes outward from the outer box 10 by an appropriate amount.

As described above, the end of the inner peripheral surface 31B of the mixing member 31 and the end of the inner peripheral surface 33B of the discharge member 33 can be achieved by forming only the upper surface of the inner peripheral surface outward.

The inclination angle of this divergence is set to be equal to or larger than the inclination angle at which the power generation device can be installed, so that the exhaust gas flow can always go to the outside. The gas flow is set so as to reliably hit the mixing member 31.

The mixing member 31, the discharge member 33, the exhaust outlet 9A, the ventilation outlet 8A, and the opening 7 may be cylindrical instead of rectangular. Further, the mixing member 31 may be directly joined and fixed to the ventilation outlet without using a flange.

With the above configuration, when the engine stops, both the engine and the cooling fan stop, so that the flow stops. However, as shown in FIG. 2, the remaining ventilation flow flows from the ventilation outlet 8A as shown by a white arrow. The exhaust gas flow is discharged from the exhaust outlet 9A while changing its flow upward as indicated by black arrows. At this time, the exhaust gas flow and the ventilation flow collide at the divergent portion of the mixing member 31 and then mix at the divergent portion of the discharge member 33.

However, since the temperature of the ventilation flow is lower than that of the exhaust gas flow, the overall temperature becomes lower than that of the ventilation flow as it flows while mixing, so that the temperature is not adversely affected even if it is discharged outside. become.

By setting the center position of the exhaust outlet 9A below the center position of the rectangular frame-shaped mixing part 31, the ventilation flow from the gap between the upper end of the exhaust pipe 9 and the mixing part 31 is increased.
It is also possible to promote a decrease in the temperature of the exhaust gas stream due to the mixing.

In this way, the temperature of the exhaust gas is rapidly lowered and discharged, so that the temperature of the handle 5 does not rise. In addition, since the discharge member 33 is projected outside the outer case 10 by an appropriate amount, the temperature of the outer case 10 does not become high.

FIGS. 4 and 5 show a third embodiment. still,
2 are given the same numbers.

4 and 5, the rectangular frame-shaped mixing member 31 surrounds the outer peripheral surface of the rectangular exhaust outlet 9A with a predetermined gap, and the outer peripheral surface 31A of the mixing member 31 is
And a rectangular ventilation outlet 8A. The mixing member 31 is supported by the rectangular exhaust pipe 9 via a stay 41, and the discharge member 33 is fitted and fixed to the opening 7 of the outer plate 1.

As described above, since the mixing member 31 is fixed to the exhaust pipe 9 by the stay 41, the method of fixing the mixing member 31 with the flange 34 interposed between the spacer 32 and the discharge member 33 shown in FIG. In comparison, the number of parts can be reduced. Further, since the mixing member 31 and the outer case 10 are not in contact with each other, conduction of heat of the mixing member 31 to the outer case 10 can be cut off.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of an exhaust gas discharge unit according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a structure of an exhaust gas discharge unit according to a second embodiment of the present invention.

FIG. 3 is an exploded view of the exhaust gas discharge unit of FIG.

FIG. 4 is a diagram showing a structure of an exhaust gas discharge unit according to a third embodiment of the present invention.

5A and 5B are enlarged views of the exhaust gas discharge portion of FIG. 4, wherein FIG. 5A is a side view and FIG.

FIG. 6 is a diagram showing an outer box structure of a conventional power generation device.

FIG. 7 is a diagram showing a structure of a conventional exhaust gas discharge unit, and showing a flow of a ventilation flow and an exhaust gas flow during engine operation.

FIG. 8 is a view showing a structure of a conventional exhaust gas discharge unit, and showing a flow of a ventilation flow and an exhaust gas flow when the engine is stopped.

[Explanation of symbols]

 Reference Signs List 1 outer plate 5 handle 6 dent 7 opening 8 box 8A ventilation outlet 9 exhaust pipe 9A exhaust outlet 10 outer box 21 guide member 21B inner peripheral surface 31 mixing member 31B inner peripheral surface 32 spacer 33 discharge member 34 flange 41 stay

Claims (7)

[Claims] 1. An outer box for covering an entire power generating apparatus, a box provided inside the outer box for covering an engine, a muffler, a generator, and the like, forming a double structure with the outer box; A ventilation outlet for discharging a ventilation flow inside the box disposed in the opening opened on the side surface; and an exhaust gas discharging portion including an exhaust outlet of an exhaust pipe disposed on the inner peripheral side of the ventilation outlet and discharging the exhaust gas flow. In the power generating device, a frame-shaped guide member projecting a predetermined amount outward from the outer box is fitted into the opening, and the guide member is joined to the ventilation outlet, while the inner peripheral surface is formed at the outer peripheral end of the exhaust outlet. , With a predetermined gap therebetween, and at least an inner peripheral surface upper surface formed to diverge outward. 2. The exhaust valve according to claim 1, wherein the center position of the exhaust outlet is located below the center position of the guide member.
An outer box structure of the power generator according to (1). 3. An outer box for covering the entire power generator, a box provided inside the outer box for covering an engine, a muffler, a generator, and the like, forming a double structure with the outer box; A ventilation outlet for discharging a ventilation flow inside the box disposed in the opening opened on the side surface; and an exhaust gas discharging portion including an exhaust outlet of an exhaust pipe disposed on the inner peripheral side of the ventilation outlet and discharging the exhaust gas flow. In the power generating device, which is joined to the ventilation outlet,
An inner peripheral surface surrounds the outer peripheral end of the exhaust outlet with a predetermined gap, and at least a frame-shaped mixing member formed so that the upper surface of the inner peripheral surface is outwardly divergent, and the outer periphery of the mixing member has a predetermined gap. And a frame-shaped discharge member having at least an inner peripheral surface upper surface diverging outwardly is provided, wherein the discharge member is outward from the mixing member, and protrudes outward from the outer box. Outer box structure of the power generation device. 4. The exhaust valve according to claim 3, wherein the center position of the exhaust outlet is located below the center position of the mixing member.
An outer box structure of the power generator according to (1). 5. A flange is provided on an outer peripheral surface of the mixing member,
The outer box structure of a power generator according to claim 3 or 4, wherein the flange is fixed to an opening of the outer box with the side surface of the spacer made of a heat shielding material and the side surface of the discharge member. 6. An outer box structure for a power generator according to claim 3, wherein said mixing member is fixed to an exhaust pipe by a stay. 7. The exhaust gas flow can always be led out to the outside by setting the inclination angle of the upper surface of the inner peripheral surface formed to diverge outwardly of the guide member or the discharge member to be equal to or greater than the inclination angle at which the power generator can be installed. 2. The method according to claim 1, wherein:
An outer box structure of the power generator according to any one of claims 6 to 6.