JP2913262B2 - Blow-by gas separation and discharge device for soundproof engine generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for discharging blow-by gas discharged from an engine of a soundproof engine generator, and more particularly to a separation apparatus for separating blow-by gas into a gas component and a liquid component.

[0002]

2. Description of the Related Art Conventionally, in various working machines with an engine, how to treat blow-by gas discharged from the engine has been one of the important neck technologies in the engine field. In some small engines, the blow-by gas is returned to the intake pipe of the engine, and then recirculated and self-processed.However, in the medium and large engines, the blow-by gas is simply discharged spontaneously to the outside of the engine. Is the current situation. The following technologies are known as blow-by gas emission of a generator having a non-soundproof bonnet. For example, 56-78
In the technology disclosed in Japanese Patent No. 6122, the blow-by gas exhaust pipe is lowered to the lower part of the engine, crawls on the gantry base, is guided to the front of the radiator, and discharges the blow-by gas to the ground surface. Further, in the technique disclosed in Japanese Utility Model Publication No. 1-172525, the exhaust pipe of the blow-by gas is lowered to a lower portion near the cooling fan, and the blow-by gas is discharged to the outside of the shaped steel of the common mount.

[0003] However, these blow-by gas discharge methods have some problems in the field work machine because the blow-by gas is guided below the hood. In particular, when the engine generator or engine compressor is used for unattended operation for a long period of time due to poor installation conditions such as setting up muddy or uneven terrain, snow accumulation during snowfall, etc., the blow-by gas discharge port is blocked and the engine is fatal. Accident was caused. Thus, in recent years, most engine-driven generators have a soundproof bonnet structure, and the method of blowing up the bonnet above the bonnet has many advantages under various conditions, and has been widely adopted.

[0004]

In the method of discharging blow-by gas downward in a soundproof bonnet structure, an oil-smoke-like gas floats under the bonnet and is sucked in from an intake port on a side surface of the bonnet. This has caused the inside of the engine to become dirty, lowering the cooling efficiency, and causing oil to adhere to the soundproofing material, causing fire due to the high heat of the exhaust pipe. In particular, in the case of machines that operate at low speed automatically, such as engine compressors, the flow rate of exhaust air also decreases, so blow-by gas is scattered in the exhaust duct, and especially, the dirt in the exhaust duct is extremely dirty. Met.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a blow-by gas separating / discharging apparatus which does not require any special operation because of a simple structure and the inside of an exhaust duct is not contaminated. Aim.

[0006]

In order to achieve the above object, the present invention relates to a soundproof engine generator having a radiator in front of an engine generator and an exhaust duct in front of the radiator. Blow-by gas is guided from the engine into the exhaust duct, and a blow-by gas separation pipe for discharging the blow-by gas to the outside is erected, and the blow-by gas separation pipe is a pipe pipe having upper and lower openings.
A gas hose for introducing blow-by gas from the engine into the upper part is connected to a connection pipe provided on the upper part of the blow-by gas separation pipe, and an air flow blown up from below the blow-by gas separation pipe is used to connect the upper part of the blow-by gas separation pipe. Is characterized in that the gas component of the blow-by gas is diffused upward and the liquid component is discharged downward by the ejector effect.

[0007]

According to the above means, the blow-by gas flowing into the blow-by gas separation pipe from the upper part of the engine through the gas hose is discharged from the radiator and blown up into an air flow rising in the blow-by gas separation pipe. The air is exhausted and blown off together with the exhaust air rising in the exhaust air duct, and is radiated to an upper and distant location outside the apparatus.
On the other hand, the liquid component that has become oil droplets due to the blow-by gas that is not blown off adheres to the inner surface of the blow-by gas separation pipe, flows downward, and is discharged outside the apparatus through the drain pipe.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show one embodiment of a blow-by gas discharge device for a soundproof engine generator according to the present invention. In FIG. 1, a soundproof bonnet 1 includes an engine 3 mounted on a base 2 and a generator 4 directly connected to the engine 3.
Further, an engine-driven cooling fan 5 provided on the front side of the engine 3 and a radiator 6 erected on the base 2 in front of the cooling fan 5 are stored. In the soundproof bonnet 1 in front of the radiator 6, the exhaust air passing through the radiator 6 is guided to an exhaust port 7 formed in the ceiling wall of the soundproof bonnet 1, and a sound absorbing material 9 such as urethane foam is adhered to the inner surface. A duct 8 is provided. Such a configuration is similar to the configuration of the conventional soundproof engine generator.

Further, in the present embodiment, a partition wall 10 is provided around the front end of the radiator 6, and an engine room 11 surrounded by the partition wall 10 and the soundproof hood 1 is formed behind the partition wall 10. As shown in FIGS. 1 and 2, both side walls 1 of the soundproof bonnet 1 extend in the width direction of the soundproof bonnet 1 at the bottom of the exhaust duct 8 near the partition wall 10.
a, a drain pipe 12a, 12b penetrating through the exhaust duct 8 and penetrating below the soundproof bonnet 1 in the trough section 12 near the side walls 1a, 1b.
Are provided at two places. These drain pipes 12a, 12b
The liquid component of the blow-by gas dropped from the blow-by gas separation pipe 14 as a pipe having upper and lower openings 14b and 14a to the gutter section 12 can reliably remove the soundproof bonnet 1 even when the present apparatus is inclined. It is provided so as to be discharged to the outside, and is also used for discharging rainwater and dust, so that the inside of the exhaust duct 8 is easily cleaned.

In the vicinity of one side wall 1a, a blow-by gas separation pipe 14 extending from slightly above the gutter section 12 to the upper part of the exhaust duct 8 is erected.
The opening 14a is provided by opening the lower end of the opening. A drain pipe 12a of the blow-by gas separation pipe 14 is arranged below the opening 14a. Also, the blow-by gas separation pipe 1
A discharge port 14 b is provided at the upper end of the exhaust duct 8 as an opening that projects obliquely toward the center of the cross section of the upper part of the exhaust duct 8. Further, a connection pipe 14c for introducing blow-by gas, which will be described later, is provided above the blow-by gas separation pipe 14 below the discharge port 14b.

The engine 3 is provided with a gas hose 15 for guiding blow-by gas discharged from above the engine 3 to a blow-by gas separation pipe 14. This gas hose 15
Is made of oil-resistant and heat-resistant vinyl chloride or the like, and is connected to the connection pipe 14 c of the blow-by gas separation pipe 14.
Reference numeral 17 denotes a muffler provided in the exhaust duct 8.

In such a configuration, when the engine 3 is started, the cooling fan 5 is driven, and cooling air flowing toward the front of the engine 3 is generated. The cooling air cools and passes through the radiator 6 and flows into the exhaust duct 8. The exhaust air from the radiator 6 that has flowed into the exhaust duct 8 rises in the exhaust duct 8, cools the muffler 17, passes through the exhaust port 7 on the ceiling of the soundproof hood 1, and rises above the outside of the soundproof hood 1. Is discharged. For this reason, the static pressure at the lower opening 14a of the blow-by gas separation pipe 14 arranged in the exhaust duct 8 is higher than the static pressure at the upper discharge port 14b. Inside, the exhaust air discharged from the radiator 6 acts in the exhaust air duct 8, and the air flow rises and flows.

On the other hand, the blow-by gas discharged from the engine 3 is guided by the gas hose 15, passes through the connection pipe 14 c of the blow-by gas separation pipe 14, and flows into the blow-by gas separation pipe 14. The blow-by gas is blown up by the air flow rising in the blow-by gas separation pipe 14 and accelerates and rises in the blow-by gas separation pipe 14 with an ejector action. It is discharged toward. Further, the blow-by gas is blown off together with the exhaust air that has been exhausted from the radiator 6 and rises from the exhaust air duct 8, and is scattered to the upper part outside the soundproof hood 1. On the other hand, the blow-by gas separation tube 1
The liquid adhering to the inner wall of the gutter 4 falls down on the gutter 12 along the inner surface of the blow-by gas separation tube 14, and the drain pipe 1 of the gutter 12
The water is dripped in the inside 3 a and discharged to the outside of the soundproof hood 1.

As described above, in the blow-by gas discharge separation device of the soundproof engine generator according to this embodiment, the engine 3
The blow-by gas discharged from the air outlet is discharged to the upper part of the air discharge duct 8 and blown off to the upper part of the soundproof hood 1 by the wind rising in the air discharge duct 8, so that the blow-by gas is Sound absorbing material 9 in duct 8
And the blow-by gas diffused upward and outside the soundproof hood 1 is no longer sucked into the engine room 11 from the outside air intake port (not shown) provided in the soundproof hood 1, The interior of the exhaust duct 8 as well as the engine room 11 can be kept clean. As a result, the adhesion of oil to the core surface of the radiator 6 is drastically reduced, and the cooling efficiency is not reduced.
Further, fire factors such as the sound absorbing material 9 in the exhaust duct 8 can be eliminated.

Further, the blow-by gas is effectively collected by the blow-by gas separating pipe 14 to form oil droplets and discharged to the outside of the soundproof bonnet 1. And the amount of the gas discharged into the atmosphere is reduced, and the overall contamination of the apparatus by blow-by gas can be reduced.

The pressure and gas amount of the blow-by gas are
Although it depends on the type, size, load condition, and other operating conditions of the engine, the dimensions and arrangement conditions of the blow-by gas separation pipe 14 are not strict but may be loose.
The device of this embodiment has an effect that the influence of the size of the machine and the length of operation time is small and the device is resistant to aging.

In this embodiment, the case of an engine generator has been described, but it goes without saying that the present invention can be applied to a case where a welding machine, a compressor, and other working machines are assembled to an engine.

[0018]

As described above, according to the present invention, the upper part of the blow-by gas separation pipe disperses the gas component of the blow-by gas upward by the ejector effect by utilizing the air flow blown up from below the blow-by gas separation pipe. Then, the gas component and the liquid component in the blow-by gas are separated, and the liquid component is collected and discharged to the outside of the soundproof hood, so that the blowby gas discharged above the soundproof hood is diffused into the atmosphere. This reduces the amount of blow-by gas that is sucked into the engine room again, keeps the engine room and the exhaust duct clean, and reduces the dirt on the entire device due to blow-by gas. ,
Furthermore, it helps prevent the cooling efficiency of the radiator from lowering, and can eliminate a fire factor inside the exhaust duct.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a blow-by gas discharge device of a soundproof engine generator according to the present invention.

FIG. 2 is a lateral side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Soundproof bonnet 2 Base 3 Engine 4 Generator 5 Cooling fan 6 Radiator 7 Air exhaust port 8 Air exhaust duct 9 Sound absorbing material 10 Partition wall 11 Engine room 12 Gutter part 12a, 12b Drain pipe 14 Blow-by gas separation pipe (pipe pipe) 14a Opening Portion 14b Discharge port (opening) 14c Connection pipe 15 Gas hose 17 Muffler

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F01M 13/04 F01M 13/00 F02B 63/04

Claims (1)

(57) [Claims] 1. A soundproof engine generator including a radiator in front of an engine of an engine generator and an exhaust duct in front of the radiator, wherein blow-by gas is introduced from the engine into the exhaust duct to generate blow-by gas. A blow-by gas separation pipe for discharging to the outside is erected, the blow-by gas separation pipe is a pipe pipe having openings at upper and lower sides, and a gas hose for introducing blow-by gas from an engine is provided at an upper portion of the blow-by gas separation pipe. The upper part of the blow-by gas separation pipe is connected to a connection pipe and blows up from below the blow-by gas separation pipe, and the upper part of the blow-by gas separation pipe disperses the gas component of the blow-by gas upward by an ejector effect, and the liquid component is discharged downward. A blow-by gas separation and discharge device for a soundproof engine generator, characterized in that: