KR20100062552A - Assistance oil cooling system of having water tank of construction equipment - Google Patents

Assistance oil cooling system of having water tank of construction equipment Download PDF

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Publication number
KR20100062552A
KR20100062552A KR1020080121245A KR20080121245A KR20100062552A KR 20100062552 A KR20100062552 A KR 20100062552A KR 1020080121245 A KR1020080121245 A KR 1020080121245A KR 20080121245 A KR20080121245 A KR 20080121245A KR 20100062552 A KR20100062552 A KR 20100062552A
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KR
South Korea
Prior art keywords
hydraulic
oil
tank
heat exchange
water tank
Prior art date
Application number
KR1020080121245A
Other languages
Korean (ko)
Inventor
권정호
Original Assignee
볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 filed Critical 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비
Priority to KR1020080121245A priority Critical patent/KR20100062552A/en
Publication of KR20100062552A publication Critical patent/KR20100062552A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • F01M2005/004—Oil-cooled engines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The disclosure discloses that hydraulic oil returned from the hydraulic motor driving the cooling fan for the main oil cooler to the hydraulic tank, or the hydraulic oil returned from the actuator to the hydraulic tank passes through the water tank, so that the hydraulic oil is caused by the mutual heat exchange of water and the hydraulic oil. To allow cooling,

An auxiliary oil cooling system using a water tank for construction equipment according to an embodiment of the present invention,

In the auxiliary oil cooling system for construction equipment,

A main oil cooler for cooling the hydraulic oil returned from the actuator to the hydraulic tank,

A hydraulic motor for rotating the cooling fan for the oil cooler to cool the working oil due to the mutual heat exchange between the outside air and the working oil,

A hydraulic pump for supplying hydraulic oil from the hydraulic tank to the hydraulic motor,

And a water tank in which a heat exchange pipe through which the hydraulic oil passes is cooled to cool the hydraulic oil due to mutual heat exchange between the hydraulic oil returned from the hydraulic motor to the hydraulic tank.

Description

Assistance oil cooling system of having water tank of construction equipment

The present invention is to cool the hydraulic fluid without using a separate auxiliary cooler using a hydraulic motor when cooling the hydraulic fluid returned to the hydraulic tank from various control valves or hydraulic cylinders (hereinafter referred to as "actuator"). Auxiliary oil cooling system using water tank for construction equipment.

More specifically, the hydraulic oil returned from the hydraulic motor driving the cooling fan for the main oil cooler to the hydraulic tank, or the hydraulic oil returned from the actuator to the hydraulic tank passes through the water tank, the hydraulic oil due to the mutual heat exchange between the water and the hydraulic oil A secondary oil cooling system using a water tank for construction equipment to allow the water to be cooled.

In general, an air-cooled cooling device installed in construction equipment such as an excavator cools the working oil and the cooling water of the engine used to drive a work device and a traveling device to a predetermined temperature or less due to mutual heat exchange with the forced air. Use an oil cooler and radiator.

As shown in Figure 1, the auxiliary oil cooling system for construction equipment according to the prior art,

A main oil cooler (2) for cooling the hydraulic oil returned from the actuator (hydraulic cylinder, etc.) to the hydraulic tank (1) through the conduit (11),

A hydraulic motor (4) for rotating the cooling fan (3) for the oil cooler to cool the working oil due to mutual heat exchange between the outside air and the working oil,

A hydraulic pump 5 for supplying hydraulic oil from the hydraulic tank 1 to the hydraulic motor 4,

And an auxiliary oil cooler 6 for cooling the hydraulic oil returned from the hydraulic motor 4 to the hydraulic tank 1.

In the drawings, reference numeral 7 denotes a proportional control relief valve installed at an upstream side of the hydraulic pump 5 and draining hydraulic oil to the hydraulic tank 1 when an overload occurs at a pressure set in the hydraulic motor 3, and 13 denotes a drain block ( drain block).

In the auxiliary oil cooling system of the prior art, since construction equipment such as excavators mainly work in a poor working environment, a separate auxiliary to improve the cooling efficiency of the oil cooler in consideration of the limited cooling of the main oil cooler (2). The oil cooler 6 is mounted.

That is, by forcedly blowing external air to the auxiliary oil cooler 6 by the rotation of the cooling fan 6a, the temperature of the hydraulic oil returned to the hydraulic tank 1 may be lowered due to mutual heat exchange between the hydraulic oil and the air.

At this time, when the temperature around the construction equipment is a high temperature (especially when working in a direct sunlight environment in the summer), the side effect of raising the temperature of the working oil in the air-cooled cooling system for forced air blowing by rotating the cooling fan This causes a problem that the cooling efficiency is lowered.

Embodiment of the present invention, the operating oil returned to the hydraulic tank from the hydraulic motor for driving the cooling fan for the main oil cooler, or the operating oil returned to the hydraulic tank from the actuator to pass through the water tank, the high temperature around the construction equipment It is also related to an auxiliary oil cooling system using water tanks for construction equipment to improve the cooling efficiency of oil coolers.

Embodiments of the present invention relate to an auxiliary oil cooling system using a water tank for construction equipment, in which a water tank for cooling hydraulic oil returned to the hydraulic tank is mounted behind the upper frame of the construction equipment to increase lifting capability. .

An auxiliary oil cooling system using a water tank for construction equipment according to an embodiment of the present invention,

In the auxiliary oil cooling system for construction equipment,

A main oil cooler for cooling the hydraulic oil returned from the actuator to the hydraulic tank,

A hydraulic motor for rotating the cooling fan for the oil cooler to cool the working oil due to the mutual heat exchange between the outside air and the working oil,

A hydraulic pump for supplying hydraulic oil from the hydraulic tank to the hydraulic motor,

And a water tank in which a heat exchange pipe through which the hydraulic oil passes is cooled to cool the hydraulic oil due to mutual heat exchange between the hydraulic oil returned from the hydraulic motor to the hydraulic tank.

An auxiliary oil cooling system using a water tank for construction equipment according to another embodiment of the present invention,

In the auxiliary oil cooling system for construction equipment,

A main oil cooler for cooling the hydraulic oil returned from the actuator to the hydraulic tank,

A hydraulic motor for rotating the cooling fan for the oil cooler to cool the working oil due to the mutual heat exchange between the outside air and the working oil,

A hydraulic pump for supplying hydraulic oil from the hydraulic tank to the hydraulic motor,

A water tank in which a heat exchange pipe through which the working oil passes is cooled to cool the working oil due to mutual heat exchange between the hydraulic oil returned from the hydraulic motor to the hydraulic tank, and

And a return flow path for cooling the hydraulic oil returned from the actuator to the hydraulic tank via the heat exchange pipe of the water tank, and then supplying the hydraulic fluid to the main oil cooler.

According to a preferred embodiment, the aforementioned water tank is mounted at the rear of the upper frame of the construction equipment.

As described above, the auxiliary oil cooling system using the water tank for construction equipment according to an embodiment of the present invention has the following advantages.

Since the operating oil returned to the hydraulic tank from the hydraulic motor driving the cooling fan for the main oil cooler or the operating oil returned to the hydraulic tank from the actuator passes through the water tank, the temperature decreases, so even when the temperature around the construction equipment is high, the oil cooler Can improve the cooling efficiency.

In addition, the water tank for cooling the hydraulic oil returned to the hydraulic tank can be mounted to the rear of the upper frame of the construction equipment to increase the workability and safety during excavation work.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which is intended to explain in detail enough to enable those skilled in the art to easily practice the present invention. This does not mean that the technical spirit and scope of the present invention is limited.

As shown in Figure 2 and 3, the auxiliary oil cooling system using a water tank for construction equipment according to an embodiment of the present invention,

In auxiliary oil cooling system for construction equipment (excavator),

A main oil cooler (2) for cooling the hydraulic oil returned from the actuator (hydraulic cylinder, etc.) to the hydraulic tank (1) through the conduit (11),

A hydraulic motor (4) for rotating the cooling fan (3) for the oil cooler to cool the working oil due to mutual heat exchange between the outside air and the working oil,

A hydraulic pump 5 for supplying hydraulic oil from the hydraulic tank 1 to the hydraulic motor 4,

It includes a water tank (9) in which a heat exchange pipe (8) through which the hydraulic fluid passes to cool the hydraulic fluid due to mutual heat exchange between the hydraulic oil (4) and the hydraulic oil returned to the hydraulic tank (1). do.

The water tank 9 described above is mounted to the rear of the upper frame 10 of the construction equipment.

At this time, the configuration except for the water tank 9 in which the heat exchange conduit 8 is installed so as to cool the hydraulic fluid due to mutual heat exchange between the hydraulic oil and water is substantially the same as the configuration described in the conventional auxiliary oil cooling system of FIG. 1. Therefore, the detailed description thereof will be omitted, and the same reference numerals will be used.

Hereinafter, with reference to the accompanying drawings an example of the use of the auxiliary oil cooling system using a water tank for construction equipment according to an embodiment of the present invention will be described in detail.

As shown in Fig. 2 and 3, the hydraulic oil returned from the hydraulic cylinder for driving a working device (boom, arm, etc.) such as an excavator, or a control valve for controlling the hydraulic oil supplied to the hydraulic cylinder, the pipeline 11 Through the main oil cooler (2) is supplied to the hydraulic tank (1).

The operating oil whose temperature is returned to the above-mentioned main oil cooler 2 is cooled by the cooling fan 3 rotated by the driving of the hydraulic motor 4 due to mutual heat exchange between the outside air and the operating oil, and then the predetermined temperature is maintained. It is held and returned to the hydraulic tank (1).

At this time, as the cooling fan 3 rotates, the operating oil whose temperature is returned to the hydraulic tank 1 from the hydraulic motor 4 is increased through the heat exchange conduit 8 of the water tank 9. Return to 1). As a result, the water in the water tank 9 and the hydraulic oil passing through the heat exchange conduit 8 undergo heat exchange with each other, thereby cooling the hydraulic oil to lower the temperature.

Therefore, as in the summer, working in a poor working environment exposed to direct sunlight, even when the temperature around the construction equipment is a high temperature, by the mutual heat exchange of the hydraulic oil and water passing through the heat exchange pipe 8 in the water tank (8) By cooling the hydraulic oil returned to the hydraulic tank 1, it is possible to improve the cooling efficiency of the oil cooler.

On the other hand, as the above-described water tank 9 is mounted to the rear of the upper frame 10 of the construction equipment can improve the lifting capacity.

As shown in Figure 4, the auxiliary oil cooling system using a water tank for construction equipment according to another embodiment of the present invention,

In auxiliary oil cooling system for construction equipment (excavator),

A main oil cooler (2) for cooling the hydraulic oil returned from the actuator (hydraulic cylinder, etc.) to the hydraulic tank (1),

A hydraulic motor (4) for rotating the cooling fan (3) for the oil cooler to cool the working oil due to the mutual heat exchange between the outside air and the working oil,

A hydraulic pump 5 for supplying hydraulic oil from the hydraulic tank 1 to the hydraulic motor 4,

A water tank 9 in which a heat exchange conduit 8 through which the hydraulic fluid passes is cooled to cool the hydraulic fluid due to mutual heat exchange between the hydraulic oil 4 and the hydraulic oil returned to the hydraulic tank 1;

A return flow passage 12 for supplying the hydraulic oil returned from the actuator (hydraulic cylinder, control valve, etc.) to the hydraulic tank 1 via the heat exchange conduit 8 of the water tank 9 to the main oil cooler 2 is provided. Include.

At this time, the hydraulic oil returned from the actuator to the hydraulic tank (1) is passed through the heat exchange conduit (8) of the water tank (9) to cool the primary, and the hydraulic fluid is cooled secondly via the main oil cooler (2). The configuration except for the return flow passage 11 to return to the after-hydraulic tank 1 is applied substantially the same as the configuration described in the auxiliary oil cooling system according to an embodiment of the present invention, the detailed description thereof will be omitted and duplicated Reference numerals are the same.

Accordingly, the hydraulic oil whose temperature is returned to the hydraulic tank 1 from the hydraulic cylinder for driving the work device, the control valve for controlling the hydraulic oil, or the like is increased through the return channel 12 for the heat exchange pipe line of the water tank 9 ( Via 8). This primarily cools the working oil due to mutual heat exchange between the water in the water tank 9 and the working oil passing through the heat exchange conduit 8.

The hydraulic oil which has passed through the heat exchange conduit 8 is once again cooled while passing through the main oil cooler 2, and then returned to the hydraulic tank 14.

As described above, the operating oil whose temperature is returned from the actuator to the hydraulic tank 1 is cooled primarily through mutual heat exchange between the water and the hydraulic oil via the heat exchange conduit 8 of the water tank 9, As the oil cooler 2 cools the secondary air due to mutual heat exchange between the outside air and the working oil, the cooling efficiency of the oil cooler can be improved.

As described above, the auxiliary oil cooling system using the water tank for construction equipment according to an embodiment of the present invention, the hydraulic oil returned from the actuator to the hydraulic tank passes through the water tank and the main oil cooler to increase the temperature around the construction equipment Even at high levels, the cooling efficiency of the oil cooler can be improved and the water tank can be mounted behind the upper frame of the construction equipment to increase the lifting capacity.

1 is a schematic hydraulic circuit diagram of an auxiliary oil cooling system for construction equipment according to the prior art;

2 is a schematic hydraulic circuit diagram of an auxiliary oil cooling system using a water tank for construction equipment according to an embodiment of the present invention;

3 is a state of use of the auxiliary oil cooling system using a water tank for construction equipment according to an embodiment of the present invention,

4 is a hydraulic circuit diagram of an auxiliary oil cooling system using a water tank for construction equipment according to another embodiment of the present invention.

* Explanation of symbols used in the main part of the drawing

One; Hydraulic tank

2; Main oil cooler

3; Cooling fan

4; Hydraulic motor

5; Hydraulic pump

6; Secondary cooler

7; Proportional Control Relief Valve

8; Heat exchanger

9; Water tank

10; Upper frame

11; pipeline

12; Return euro

Claims (3)

In auxiliary oil cooling system for construction equipment: A main oil cooler for cooling the hydraulic oil returned from the actuator to the hydraulic tank; Hydraulic motor for rotating the cooling fan for the oil cooler to cool the working oil due to the mutual heat exchange between the outside air and the working oil; A hydraulic pump for supplying hydraulic oil from the hydraulic tank to a hydraulic motor; And Auxiliary oil using a water tank for construction equipment, characterized in that it comprises a water tank in which a heat exchange pipe through which the hydraulic oil passes to cool the hydraulic oil due to mutual heat exchange between the hydraulic oil returned to the hydraulic tank from the hydraulic motor Cooling system. In auxiliary oil cooling system for construction equipment: A main oil cooler for cooling the hydraulic oil returned from the actuator to the hydraulic tank; Hydraulic motor for rotating the cooling fan for the oil cooler to cool the working oil due to the mutual heat exchange between the outside air and the working oil; A hydraulic pump for supplying hydraulic oil from the hydraulic tank to a hydraulic motor; A water tank in which a heat exchange pipe through which the working oil passes is cooled to cool the working oil due to mutual heat exchange between the hydraulic oil returned from the hydraulic motor to the hydraulic tank; And And a return flow path for supplying the hydraulic oil returned from the actuator to the hydraulic tank to the main oil cooler via a heat exchange pipe of the water tank. The auxiliary oil cooling system according to claim 1 or 2, wherein the water tank is mounted to the rear of the upper frame of the construction equipment.
KR1020080121245A 2008-12-02 2008-12-02 Assistance oil cooling system of having water tank of construction equipment KR20100062552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080121245A KR20100062552A (en) 2008-12-02 2008-12-02 Assistance oil cooling system of having water tank of construction equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080121245A KR20100062552A (en) 2008-12-02 2008-12-02 Assistance oil cooling system of having water tank of construction equipment

Publications (1)

Publication Number Publication Date
KR20100062552A true KR20100062552A (en) 2010-06-10

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Application Number Title Priority Date Filing Date
KR1020080121245A KR20100062552A (en) 2008-12-02 2008-12-02 Assistance oil cooling system of having water tank of construction equipment

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103541389A (en) * 2013-09-24 2014-01-29 徐州徐工特种工程机械有限公司 Adjustable independent heat dissipation device of loader-digger
CN105971048A (en) * 2016-06-28 2016-09-28 徐工集团工程机械股份有限公司科技分公司 Wheel loader radiator arrangement structure
KR102355348B1 (en) 2021-05-26 2022-01-24 황일규 A Skid steer loader equipped with stable water supply structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103541389A (en) * 2013-09-24 2014-01-29 徐州徐工特种工程机械有限公司 Adjustable independent heat dissipation device of loader-digger
CN105971048A (en) * 2016-06-28 2016-09-28 徐工集团工程机械股份有限公司科技分公司 Wheel loader radiator arrangement structure
KR102355348B1 (en) 2021-05-26 2022-01-24 황일규 A Skid steer loader equipped with stable water supply structure

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