A heat sink for an engine of a construction machine

Abstract

The utility model discloses a heat abstractor for engineering machinery diesel engine, including installation shell, the inside installation of installation shell has diesel engine, and the middle part of the top board of installation shell is shaped and has exhaust passage, and the filter screen is fixed on the top board of installation shell and covers exhaust passage, the output shaft of diesel engine stretches out the front end plate of installation shell, it improves the air circulation flow in the inside of installation shell through the linkage of air inlet fan and upper air outlet fan, and simultaneously, it is directly fixed heat exchange device on the outer wall surface of diesel engine, and simultaneously, cooperates the circulating flow liquid and the circulating air flow, thereby makes the heat transfer of diesel engine to the water liquid in heat exchange device, through the operation of air inlet fan and upper air outlet fan, makes the air quick flow and makes the water liquid in heat exchange device and heat dissipation cold row quick cooling, improves the heat exchange effect, makes diesel engine whole cooling balance, guarantees its normal use.

Description

TECHNICAL FIELD

[0001] The utility model relates to diesel engine equipment technical field more specifically, relate to a heat abstractor for engineering machinery diesel engine. BACKGROUND

[0002] The advantage of diesel engine is that power is big, economic performance is good. The working process of diesel engine has many same places with gasoline engine, and each working cycle also experiences four strokes of intake, compression, work, exhaust. But because the fuel of diesel engine is diesel, its viscosity is bigger than gasoline, and it is not easy to evaporate, and its self-ignition temperature is lower than gasoline, therefore the formation of combustible mixture and ignition mode are different from gasoline engine, the main difference is that the mixture in the cylinder of diesel engine is compression ignition, not ignition.

[0003] The air enters the cylinder when the diesel engine works, and when the air in the cylinder is compressed to the end point, high temperature and high pressure are generated, the piston approaches the top dead center, the high-pressure pump on the engine sprays diesel into the cylinder at high pressure, the diesel forms fine oil particles and mixes with high-temperature and high-pressure air, the diesel mixture burns by itself, expands violently, generates explosion force, pushes the piston down to work, at this time, higher heat and air pressure are generated, and great power is generated.

[0004] After the diesel engine runs for a period of time, the whole device will become very hot, so it is necessary to cool the diesel engine, and the existing diesel engine cooling device is mostly connected with a water jacket on the cylinder body, and the water jacket is connected with a water tank for cooling, which cannot comprehensively cool the diesel engine, and the temperature difference on the surface of the diesel engine is large, which affects the service life of the diesel engine.

[0005] Therefore, a heat abstractor for engineering machinery diesel engine is needed to improve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model discloses a heat abstractor for engineering machinery diesel engine, which improves the air circulation in the installation shell through the linkage of the air inlet fan and the upper air outlet fan, and at the same time, the heat exchange device is directly fixed on the outer wall of the diesel engine, and the circulating water and the circulating air flow are combined, so that the heat of the diesel engine is transferred to the water in the heat exchange device, and then the air flows quickly through the operation of the air inlet fan and the upper air outlet fan, which quickly cools the water in the heat exchange device and the heat dissipation cold row, improves the heat exchange effect, and makes the overall temperature of the diesel engine balanced, ensuring normal use.

[0007] The utility model discloses a heat abstractor for engineering machinery diesel engine, which improves the air circulation in the installation shell through the linkage of the air inlet fan and the upper air outlet fan, and at the same time, the heat exchange device is directly fixed on the outer wall of the diesel engine, and the circulating water and the circulating air flow are combined, so that the heat of the diesel engine is transferred to the water in the heat exchange device, and then the air flows quickly through the operation of the air inlet fan and the upper air outlet fan, which quickly cools the water in the heat exchange device and the heat dissipation cold row, improves the heat exchange effect, and makes the overall temperature of the diesel engine balanced, ensuring normal use.

[0008] A heat dissipation device for an engineering machinery diesel engine, comprising a mounting shell, a diesel engine is mounted in the mounting shell, an exhaust passage is formed in the middle of the top plate of the mounting shell, and a filter screen is fixed on the top plate of the mounting shell and covers the exhaust passage;

[0009] An output shaft of the diesel engine extends out of the front end plate of the mounting shell;

[0010] A plurality of air inlet through holes are formed in the front end plate of the mounting shell, and a plurality of air inlet fans are fixed on the inner wall surface of the front end plate of the mounting shell and face the corresponding air inlet through holes;

[0011] A plurality of front filter screen pieces are fixed on the front end plate of the mounting shell.

[0012] A heat exchange device is fixed on the outer wall surface of the diesel engine, a heat dissipation cold row is fixed on the bottom surface of the top plate of the mounting shell and is below the exhaust passage, a water tank and a circulating pump are mounted in the mounting shell, the water outlet end of the heat exchange pipe of the heat exchange device is connected in communication with the water inlet end of the heat dissipation cold row through a connecting pipe, the water outlet end of the heat dissipation cold row is connected in communication with the liquid inlet of the water tank through a connecting pipe, the water inlet of the circulating pump is connected in communication with the water tank through a connecting pipe, and the water outlet of the circulating pump is connected in communication with the water inlet of the heat exchange pipe through a connecting pipe.

[0013] A plurality of upper air outlet fans are fixed on the bottom surface of the heat dissipation cold row, and the air outlet of the upper air outlet fan faces the heat dissipation cold row.

[0014] The utility model discloses a heat dissipation device for an engineering machinery diesel engine, comprising a mounting shell, a diesel engine is mounted in the mounting shell, an exhaust passage is formed in the middle of the top plate of the mounting shell, and a filter screen is fixed on the top plate of the mounting shell and covers the exhaust passage;

[0015] Compared with the prior art, it improves the air circulation in the mounting shell through the linkage of the air inlet fan and the upper air outlet fan, and simultaneously, the heat exchange device is directly fixed on the outer wall surface of the diesel engine, and the circulating water and the circulating air flow are matched, so that after the heat of the diesel engine is transferred to the water in the heat exchange device, the air quickly flows to rapidly cool the water in the heat exchange device and the heat dissipation cold row through the operation of the air inlet fan and the upper air outlet fan, the heat exchange effect is improved, the overall cooling of the diesel engine is balanced, and normal use is ensured. ACCURACY OF DRAWINGS:

[0016] Fig. 1 It is a partial structure schematic view of the utility model;

[0017] Fig. 2 It is a partial sectional view of the utility model;

[0018] Fig. 3 It is a partial structure schematic view of the heat exchange device in the form of a flat plate. CONCRETE IMPLEMENTATION:

[0019] The embodiment is shown in the accompanying drawings, Figs. 1 to 3As shown, a heat dissipation device for an engineering machinery diesel engine comprises a mounting shell 10, a diesel engine 20 is mounted inside the mounting shell 10 (the mounting shell 10 protects the diesel engine 20), the diesel engine 20 is fixed on the top surface of the bottom plate of the mounting shell 10 through the bottom mounting feet, the middle part of the top plate of the mounting shell 10 is shaped into an exhaust passage 11, a filter screen 1 is fixed on the top plate of the mounting shell 10 and covers the exhaust passage 11;

[0020] The output shaft of the diesel engine 20 extends out of the front end plate of the mounting shell 10;

[0021] A plurality of air inlet through holes 12 are formed on the front end plate of the mounting shell 10, and four air inlet through holes 12 are formed on the front end plate of the mounting shell 10 in this embodiment.

[0022] A plurality of air inlet fans 30 are fixed on the inner wall surface of the front end plate of the mounting shell 10, and the air inlet fans 30 face the corresponding air inlet through holes 12;

[0023] A plurality of front filter screen pieces 2 are fixed on the front end plate of the mounting shell 10, and each front filter screen piece 2 covers a corresponding air inlet through hole 12.

[0024] In this embodiment, the flowing air is filtered through the front filter screen pieces 2 and the filter screen 1, and at the same time, external solid objects and the like are prevented from entering the mounting shell 10, thereby protecting the components inside the mounting shell 10.

[0025] Further, a heat exchange device 40 is fixed on the outer wall surface of the diesel engine 20 (the diesel engine 20 in the drawings of this embodiment is a simple schematic diagram, and its specific structure is not a regular shell in the shape of a rectangle or a cylinder, etc., therefore, the heat exchange device 40 of this application is actually composed of a plurality of separate heat exchange devices, which can be in various structures such as flat plates or arcs, and is closely attached to the corresponding shape of the outer wall surface of the diesel engine 20, and the heat exchange pipes 41 in every two adjacent heat exchange devices are connected through connecting pipes, that is, the outlet of the heat exchange pipe 41 in the front heat exchange device is communicated with the inlet of the heat exchange pipe 41 in the rear heat exchange device, and only the flat heat exchange device is shown in the drawings of this embodiment), a heat dissipation cold row 50 is fixed on the bottom surface of the top plate of the mounting shell 10, the heat dissipation cold row 50 is below the exhaust passage 11, a water tank 60 and a circulating pump 70 are mounted in the mounting shell 10, the outlet of the heat exchange pipe 41 of the heat exchange device 40 is communicated with the inlet of the heat dissipation cold row 50 through a connecting pipe, the outlet of the heat dissipation cold row 50 is communicated with the inlet of the water tank 60 through a connecting pipe, the inlet of the circulating pump 70 is communicated with the water tank 60 through a connecting pipe, and the outlet of the circulating pump 70 is communicated with the inlet of the heat exchange pipe 41 through a connecting pipe.

[0026] The heat exchange device 40 comprises S-shaped coiled heat exchange pipes 41 and a plurality of heat dissipation fins 42 clamped on corresponding transverse straight pipe sections of the heat exchange pipes 41, and corresponding sides of the heat dissipation fins 42 are pressed against the outer wall surface of the diesel engine 20.

[0027] Clamping pieces are clamped and fixed at both ends of all the transverse straight pipe sections of the heat exchange pipes 41, and the clamping pieces are fixed on corresponding outer wall surfaces of the diesel engine 20.

[0028] A plurality of upper air outlet fans 2 (four upper air outlet fans 2 in the embodiment) are fixed on the bottom surface of the heat dissipation cold row 50, and air outlets of the upper air outlet fans 2 face the heat dissipation cold row 50.

[0029] All the electric components in the embodiment are electrically connected with the control host through electric connection lines, and the control host can be arranged outside the mounting shell 10 and has a conventional structure, which will not be described in detail here and is not shown in the drawings.

[0030] In use, a temperature sensor can be arranged in the mounting shell 10 to sense the temperature inside at any time, and the temperature sensor is electrically connected with the control host through electric connection lines. Two temperatures can be set, one being a high temperature and the other being a low temperature. The specific temperatures are set according to actual operation, and specific temperatures will not be exemplified here.

[0031] When the temperature sensed by the temperature sensor reaches the set low temperature, the air inlet fan 30 and the upper air outlet fan 2 are operated, so that the external air enters the mounting shell 10 after being filtered by the front filter screen 2, and the heat of the diesel engine 20 is transferred to the heat dissipation fins 42 of the heat exchange device 40 through the outer wall surface, enters the mounting shell 10, blows through the heat dissipation fins 42, exchanges heat with the heat dissipation fins 42, increases the temperature of the air, and is discharged through the exhaust passage 11, thereby achieving cooling.

[0032] When the temperature sensed by the temperature sensor reaches the set high temperature, the circulating pump 70 is operated to realize the circulation of the water liquid. The water liquid first flows through the heat exchange pipes 41 to exchange heat with the heat dissipation fins 42, so that the temperature of the water liquid is increased and the heat of the diesel engine 20 is removed. Then, the water liquid with the increased temperature enters the heat dissipation cold row 50 (which is a conventional product composed of a bias pipe and fins, which will not be described in detail here), and the upper air outlet fan 2 blows air to the heat dissipation cold row 50, so that the heat of the heat dissipation cold row 50 is removed by the air, and the water liquid flowing in the heat dissipation cold row 50 is rapidly cooled. Then, the water liquid returns to the water tank 60, and then is transported to the heat exchange pipes 41 of the heat exchange device 40 by the operation of the circulating pump 70, thereby realizing the circulation cooling, and the cooling effect is good.

[0033] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A heat sink for an engine of a construction machine, comprising a mounting housing (10), characterized in that: The diesel engine (20) is installed in the installation housing (10), the exhaust passage (11) is formed in the middle of the top plate of the installation housing (10), and the filter screen (1) is fixed on the top plate of the installation housing (10) and covers the exhaust passage (11). The output shaft of the diesel engine (20) extends out of the front end plate of the installation housing (10). A plurality of air inlet holes (12) are formed in the front end plate of the installation housing (10), and a plurality of air inlet fans (30) are fixed on the inner wall surface of the front end plate of the installation housing (10) and face the corresponding air inlet holes (12). A plurality of front filter screen pieces (2) are fixed on the front end plate of the installation housing (10), and each front filter screen piece (2) covers the corresponding air inlet hole (12).

2. A heat dissipating device for a diesel engine of a construction machine according to claim 1, characterized in that: The heat exchange device (40) is fixed on the outer wall surface of the diesel engine (20), the heat dissipation cold row (50) is fixed on the bottom surface of the top plate of the installation housing (10) and is below the exhaust passage (11), the water tank (60) and the circulating pump (70) are installed in the installation housing (10), the outlet of the heat exchange pipe (41) of the heat exchange device (40) is connected to the inlet of the heat dissipation cold row (50) through a connecting pipe, the outlet of the heat dissipation cold row (50) is connected to the inlet of the water tank (60) through a connecting pipe, the inlet of the circulating pump (70) is connected to the water tank (60) through a connecting pipe, and the outlet of the circulating pump (70) is connected to the inlet of the heat exchange pipe (41) through a connecting pipe.

3. A heat dissipating device for a diesel engine of a construction machine according to claim 2, characterized in that: The heat exchange device (40) comprises the S-shaped coiled heat exchange pipe (41) and a plurality of heat dissipation fins (42) clamped on the corresponding transverse straight pipe portions of the heat exchange pipe (41), and the corresponding side of the heat dissipation fin (42) is pressed against the outer wall surface of the diesel engine (20).

4. A heat dissipating device for a diesel engine of a construction machine according to claim 3, characterized in that: The connecting plates are clamped and fixed at both ends of all the transverse straight pipe portions of the heat exchange pipe (41) and are fixed on the corresponding outer wall surface of the diesel engine (20).

5. A heat dissipating device for a diesel engine of a construction machine according to claim 1, characterized in that: Four air inlet holes (12) are formed in the front end plate of the installation housing (10).

6. A heat dissipating device for a diesel engine of a construction machine according to claim 2, characterized in that: A plurality of upper air outlet fans (2) are fixed on the bottom surface of the heat dissipation cold row (50), and the air outlet of the upper air outlet fan (2) faces the heat dissipation cold row (50).

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