JPS61205367A - Sunction pipe setting structure for internal-combustion engine - Google Patents

Abstract

PURPOSE:To make connection between a suction pipe and an air cleaner performable ever so easy, by constituting a setting structure so as to insert one's hand from an opening of the air cleaner as well as to take hold of an inlet pipe of the suction pipe inside an engine room after locking a case outer wall. CONSTITUTION:In an engine room 30, there is provided with a mixer 31 mixing air with fuel gas, and an air inlet at its upper end is connected to an outlet of an air cleaner 37 via an inlet pipe 36 of a suction pipe 34. In this case, the inlet pipe 36 uses an elastic material and its lower half part 70 is formed into bellows form while the upper half part 71 into straight cylindrical form, respectively. And, an annular outward flange 72 is installed in the upper half part 71, while this flange 72 is seated at a peripheral part 74 of a center hole 73 in a lower case 52, constituting an engaging part. In addition, a hole 75 is formed in an upper part of the upper half part 71, installing a handle 76 which is made so as to be held by the hand inserted from an upper end opening 64 of an air cleaner chamber 59.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a structure for installing an intake pipe suitable for an engine used as a heat pump system for heating and cooling.

(Prior art) One type of heat pump system driven by an engine is to immerse the engine to drive the compressor in water or other heat medium liquid in a liquid tank, and use the heat of the engine to heat the heat medium. There is something to do. The upper opening of the liquid tank is connected with a lid, and the lid is covered with a cover from above, and working equipment, oil cleaners, and other auxiliary equipment are installed in the space between the lid and the cover. There is.

In Japanese Patent Application No. 59-93345, the present applicant has proposed a technique in which the cover is made into a hollow structure and an intake silencer or air cleaner is provided inside the cover to sufficiently increase the capacity of the intake silencer.

(Problem to be solved by the invention) However, when an air cleaner or the like is provided inside the cover, during assembly work, after the outer wall (cover, etc.) is assembled, the engine intake pipe and the air cleaner are connected in the engine room surrounded by the outer wall. need to be connected. Therefore, when connecting the intake pipe and the air cleaner using a common joint structure such as a hose band or a seven-lunge, the connection operation becomes impossible or extremely difficult. Furthermore, the engine and the outer wall of the engine room are installed with different vibration systems as a vibration-proofing measure, so there is a problem in that the structure becomes complicated when they are connected using bolts.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides that after fixing the outer wall,
This allows the intake pipe to be drawn from the 1lIIl chamber to the connection position with the air cleaner by external operation, and is constructed as follows.

That is, in the present invention, an engine room is formed by an outer wall having a closed structure, the outer wall is made into a hollow structure, an air cleaner is provided inside the outer wall, and the upstream portion of the intake pipe of the engine located in the engine room is formed by a flexible inlet pipe. , the inlet pipe is connected to the air cleaner, and a retaining part is provided in the inlet pipe and the air cleaner to engage with each other to prevent the inlet pipe from falling off from the air cleaner, and the engaging part of the inlet pipe is connected to the engine room. The air cleaner is characterized in that the air cleaner can be moved to a position where it passes through the engaging portion in an elastically deformed state and is connected to the air cleaner outlet, and the air cleaner is provided with an opening for performing the above moving operation from the outside.

(Function) According to the above configuration, during assembly work, after fixing the outer wall, insert your hand through the opening of the air cleaner T, grasp the inlet pipe in the engine room, and in that state pull the inlet pipe to the position where it connects to the air cleaner. This completes the connection work between the intake pipe and the air cleaner.

(Example) In FIG. 2, which is a partially cutaway schematic front view, a liquid tank 2 is housed inside an outside 1i1 that opens at the top. Water W for heat medium or other liquid is stored in the liquid tank 2, and the engine 3 is installed in the water W. In order to utilize the water W heated by the engine 3 as a heat source, a pipe P is spirally provided inside the liquid tank 2 along its inner peripheral surface. The pipe P is connected to a water heater, a heater, etc. on the outside.

The engine 3 is installed with the crankshaft 5 (only the center line shown) being vertical, and the cylinder block 7 and cylinder head 8 are aligned horizontally with respect to the crankcase 6.

The crankshaft 5 projects upward from the crankcase 6, and a flywheel (not shown) is fixed to the projecting end thereof. The flywheel is surrounded from below and around the flywheel housing 15, and the housing 15 is bolted to the crankcase 6 in a water-tight manner. An input shaft (not shown) of a working machine 16 is connected to the upper end of the flywheel. Specifically, the working machine 16 is a compressor or generator for an air-conditioning machine, a pump for hot water circulation, or the like.

A mounting flange 17 is fixed to the upper end of the flywheel housing 15. The work implement 16 is fitted onto the inner periphery of the flange 17 from above and secured with bolts. An oil cleaner 19, an oil supply port (not shown), etc. are attached to the upper surface of the flange 17 around the work 1116.

7 The outer periphery of the flange 17 is an annular engine mount 20 (
It is supported from below by the inner periphery of the mounting plate via anti-scratch rubber 21 and seal 22.

The outer peripheral part of the mount 20 is connected to the annular large diameter part 23 at the upper end of the liquid tank 2 via a seal 24. The cover 27 is fixed to the large diameter portion 23 with a plurality of vertical bolts 25.

The cover 27 is a generally annular member whose outer periphery fits into the upper end of the outer cylinder 1, and between the flange 17 and mount 20 and the cover 27 is an engine room where the working equipment 16, oil cleaner 19, etc. are housed. 30 is formed.

In addition to the above equipment, a mixer 31 is provided in the engine room 30. The mixer 31 is a device used only when a gas engine is used, and serves to mix air and fuel gas. Further, when the engine 3 uses only fuel oil as fuel, a simple joint is used in place of the mixer 31.

The mixer 31 is fixed to the upper surface of the flange 17, and the intake outlet at the lower end is connected to the intake port of the cylinder head 8 via the outlet pipe 35 of the intake pipe 34, and the air port at the upper end is connected to the intake pipe 35 of the intake pipe 34. It is connected to the outlet of the air cleaner 37 via.

The case 39 of the air cleaner 37 is circular and flat, and the case 39 of the cover 27 is closed with the large diameter opening 42 at the upper end of the cover 27 closed.
It is fixed to an inward 7 flange 40 at the upper end of 7 with a plurality of bolts 41. Also, cover 27 and case 39 engine room 3
A sound absorbing material 45 is attached to the surface facing 0.

An upper cover 46 is provided above the cover 27. When the working machine 16 is a heating and cooling compressor, a heat exchanger 47 is installed under the upper cover 46. The upper cover 46 is fixed to the cover 27 and the upper end of the outer cylinder 1,
A fan 48 is provided inside one open end. A ventilation opening 50 connecting the internal passage 49 of the upper cover 46 and the engine room 30 is provided approximately in the center of the case 39.

The air cleaner case 39 is constructed by fitting an upper case 51 and a lower case 52 together on a horizontal plane 1, and their outer peripheral portions are fixed to each other by the bolts 41. The case 39 has a hollow structure as a whole, and a silencing chamber 53 is formed throughout the inside of the case. A sound absorbing material 55 is pasted on almost the entire inner surface of the upper case 51 and the lower case 52.

The ventilation port 50 is separated from the sound absorption chamber 53 by a cylindrical portion 56 of the case 39. Further, an intake port 57 is provided in a portion of the E section case 51 near the outer periphery away from the mixer 31.

As shown in Fig. 1, which corresponds to the enlarged partial view of Fig. 2, the mixer 3
1, an air cleaner chamber 59 for accommodating an air cleaner element 60 is formed in the case 39. Around the chamber 59, the upper case 51 has an upwardly projecting generally cylindrical wall 61, and the lower case has a downwardly projecting annular wall 62. The element 60 has a cylindrical shape and is vertically attached to the upper surface of an annular wall 62 via an annular packing 63 made of urethane or the like.
The upper end portion protrudes upward from the cylindrical wall portion 61. A peripheral portion of a bowl-shaped element cover 65 is fixed to the upper end of the cylindrical wall portion 61 with a plurality of bolts 66 . The element cover 65 closes the upper end opening 64 of the chamber 59 with the element 60 and packing 63 compressed downward. Further, a packing 67 made of urethane or the like is interposed between the upper end of the element 60 and the element cover 65.

The intake inlet pipe 36 is made of an elastic material such as rubber,
The lower half portion 70 is formed into a bellows shape.1. l: The half portion 71 is formed into a straight cylindrical shape. The upper half 71 is integrally provided with an annular outwardly directed 7 flange 72 at its lower end.
Seven cylindrical flanges 77 are formed on the lower surface of the holder. In the connected state shown in FIG.
is seated on the upper surface of the peripheral edge 74 of the hole 73. That is, the 7 flange 72 and the peripheral portion 74 engage with each other to close the inlet tube 36.
An engaging portion is formed to prevent the material from falling off. Further, the cylindrical flange 77 is fitted into the inner periphery of the hole 73 and the upper half 71
is positioned in the radial direction. The element 60 and the packing 63 are compressed as described above, and the element 6
0 elastically presses against the upper surface of the 7 flange 72, and the seal 6
3 is in elastic pressure contact with the outer periphery of the flange 72.

In the assembly operation, the inlet pipe 36 is connected to the air cleaner 37 after all other parts are assembled as shown in the drawings. In other words, the inlet pipe 36 is fixed to the mixer 31 in advance, and after the case 39 is fixed and the engine room 30 is closed, it is inserted into the air cleaner room 59 from inside the engine room 30 and connected thereto.

In order to facilitate such work, one or more holes 75 are provided at the top of the upper half 71 at intervals in the circumferential direction.
A handle 76 is formed by the peripheral edge of the hole 75. This handle 76 is for example to be grasped by hand, and during assembly work, with the element cover 65 removed, insert your hand through the upper end opening 64 of the chamber 59 and grasp the handle of the upper half 71 of the inlet pipe inside the engine room 30. 76 and can be pulled up to the element chamber 59.

Also, during this pulling operation, the flange 72 is elastically deformed and passes inside the peripheral edge 74, but in consideration of this deformation, the inner peripheral surface 78 of the peripheral edge 74 has a diameter that increases as it goes downward. Teba is attached.

As a result, when the 7 flange 72 passes inside the peripheral edge 74, it is guided by the tapered inner circumferential surface 78 and deforms elastically.
It is possible to move up to the upper part of the peripheral portion 74 without difficulty.

(Function) In FIG. 2, in the operating state, combustion air of the engine enters the silencing chamber 53 from the passage 49 through the intake port 57, passes through the element 60 and is filtered, and then passes through the intake inlet pipe 36.
, mixer 31, intake outlet pipe 35, etc., to the cylinder head 8.

In this intake operation, the noise reduction chamber 53 of the air cleaner 37 (intake silencer) has a large volume, and the inner surface is covered with a sound absorbing material 55, so that intake noise is sufficiently muffled. Further, the case 39 is a hollow structure,
Since the rigidity is high, vibration of the case 39 and noise transmission due to the vibration are largely prevented.

During operation, the engine room 30 is ventilated by the fan 48 through the passage 49 and the ventilation port 50, so the engine room 30 does not reach a temperature of a. Therefore, a significant temperature rise in the working machine 16 and other equipment is prevented, and durability is improved. Moreover, since the air cleaner 37 is flat and the length of the ventilation port 50 is short, the resistance of the ventilation port 50 to the air flow is small. Therefore, the ventilation efficiency by the fan 48 is maintained sufficiently high.

When performing maintenance inspection on the work equipment 16 or oil cleaner 19, or when replenishing oil from the oil supply port in the engine room 30, the bolt 41 is removed and the air cleaner 37
The whole thing is removed. As a result, the large diameter opening 80 of the cover 27
The above-mentioned maintenance and inspection work and oil replenishment work can be easily performed through the shaft.

When replacing the air cleaner element 60, there is no need to disassemble the case 39 vertically, and the element 60 can be easily replaced by simply removing the small element cover 65.

(Effects of the Invention) As explained above, according to the present invention, after the case 39 (outer wall) is assembled, the intake pipe 34 can be connected to the air cleaner 37 by inserting a hand from the outside. The air cleaner 37 of the type in which the niremen 160 is provided in the hollow interior can be used without any problem, and various advantages such as reduction of intake noise can be obtained as described above. .

Further, as shown in the figure, if a handle 76 is provided on the inlet pipe 36, the operation of pulling in the inlet pipe 36 can be performed extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of an embodiment of the present invention, and FIG. 2 is a partially cutaway schematic front view of an engine employing the embodiment of the present invention. 3... Engine, 30... Engine room, 34... Intake pipe, 36... Inlet pipe, 37... Air cleaner, 39
... Air cleaner case (outer wall), 64... Opening,
72.74...7 Lunge and peripheral portion (engaging portion) Patent applicant Yanmar Diesel Co., Ltd. Figure 1

Claims (1)

[Claims] An engine room is formed by an outer wall having a closed structure, the outer wall is made into a hollow structure, an air cleaner is provided inside the outer wall, and the upstream part of the intake pipe of the engine located in the engine room is formed with a flexible inlet pipe, and the inlet pipe is An engaging portion is provided which connects to the air cleaner and engages the inlet pipe and the air cleaner with each other to prevent the inlet pipe from falling off from the air cleaner. An intake pipe mounting structure for an internal combustion engine, characterized in that the air cleaner can be moved in an elastically deformed state to a position where it is connected to an air cleaner outlet, and the air cleaner is provided with an opening for performing the above-mentioned moving operation from the outside.