KR100688662B1 - Apparatus for controlling driving a cooling fan drive in a construction heavy equipment - Google Patents

Apparatus for controlling driving a cooling fan drive in a construction heavy equipment Download PDF

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KR100688662B1
KR100688662B1 KR1020050132466A KR20050132466A KR100688662B1 KR 100688662 B1 KR100688662 B1 KR 100688662B1 KR 1020050132466 A KR1020050132466 A KR 1020050132466A KR 20050132466 A KR20050132466 A KR 20050132466A KR 100688662 B1 KR100688662 B1 KR 100688662B1
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South Korea
Prior art keywords
cooling fan
predetermined time
switching valve
fan motor
current
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KR1020050132466A
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Korean (ko)
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지덕근
김성일
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두산인프라코어 주식회사
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Priority to KR1020050132466A priority Critical patent/KR100688662B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • 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
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating

Abstract

An apparatus for controlling operation of a cooling fan of heavy equipment for construction is provided to prevent impact and improve durability by temporarily stopping a cooling fan motor when a forward rotation of the cooling fan is converted into a reverse rotation. A method for controlling operation of a cooling fan(2A) of heavy equipment for construction, includes a step of accelerating a cooling fan motor(2) in a forward direction by providing forward current to a solenoid unit(10A) of a solenoid switch valve(10); a step of rotating the cooling fan motor in a forward direction by maintaining the current supplied to the solenoid unit at a constant level for a predetermined time; a step of decelerating the cooling fan motor by providing forward current to the solenoid unit; a step of stopping the cooling fan motor by cutting off the current supplied to the solenoid unit; a step of reversely rotating the cooling fan for a predetermined time by providing reverse current to the solenoid unit; and a step of reversely rotating the cooling fan for a predetermined time by providing reverse current to the solenoid unit.

Description

건설중장비의 냉각팬 구동제어장치{ Apparatus for controlling driving a cooling fan drive in a construction heavy equipment} Apparatus for controlling driving a cooling fan drive in a construction heavy equipment}

도 1은 종래 건설중장비의 냉각팬 구동제어장치에 대한 개략적인 유압회로도,1 is a schematic hydraulic circuit diagram of a cooling fan drive control apparatus of a conventional construction equipment,

도 2는 본 발명에 따른 냉각팬 구동제어시스템의 개략적인 유압회로도, 2 is a schematic hydraulic circuit diagram of a cooling fan drive control system according to the present invention;

도 3는 본 발명에 따른 냉각팬 구동제어방법의 제어선도이다. 3 is a control diagram of a cooling fan drive control method according to the present invention.

※ 도면의 주요부분에 대한 부호의 설명※※ Explanation of code about main part of drawing ※

1: 유압펌프 2: 냉각팬모터1: hydraulic pump 2: cooling fan motor

2A: 냉각팬2A: cooling fan

3: 브레이크 및 파이롯공급밸브 5: 브레이크장치3: Brake and Pilot Supply Valve 5: Brake System

6: 파킹브레이크 7: 프론트제어장치6: Parking brake 7: Front control device

10: 절환밸브 10A: 솔레노이드부10: switching valve 10A: solenoid part

10B: 수압부 11: 선택스위치10B: Hydraulic section 11: Selection switch

11A: 제어부 L1: 유압라인11A: control part L1: hydraulic line

본 발명은 건설중장비의 냉각팬 구동제어장치에 관한 것으로, 특히 휠로더와 같은 건설중장비에서 유압모터에 의해 회전하면서 라디에이터를 냉각시키는 냉각팬의 구동제어장치에 관한 것이다. The present invention relates to a cooling fan drive control device for heavy construction equipment, and more particularly, to a drive control device for a cooling fan that rotates by a hydraulic motor in a heavy construction equipment such as a wheel loader to cool the radiator.

일반적으로 휠로더는, 도 1에 도시된 바와 같이, 유압펌프(1)의 압유가 브레이크 및 파이롯공급밸브(3)에서 제어되어 일부는 브레이크장치(5)쪽으로 공급되고, 일부는 파킹브레이크(6)나 프론트제어장치(7)쪽으로 공급되는 한편, 유압라인(L1)을 통하여 냉각팬 구동모터(2)로 공급된다. In general, the wheel loader, as shown in Figure 1, the hydraulic pressure of the hydraulic pump (1) is controlled by the brake and the pilot supply valve (3), part of which is supplied to the brake device (5), part of the parking brake (6) ) Or to the front control device 7, and to the cooling fan drive motor 2 through the hydraulic line L1.

그리고 상기 냉각팬 구동모터는 양방향으로 회전하는 모터를 사용하여 냉각용으로 사용할 때에는 한쪽 방향으로 회전시키고, 냉각구동을 할 때 퇴적되는 먼지를 떨어낼 때는 냉각팬 구동모터를 역방향으로 회전시키게 되어 있다. In addition, the cooling fan drive motor rotates in one direction when used for cooling by using a motor that rotates in both directions, and rotates the cooling fan drive motor in the reverse direction when dust is accumulated during cooling operation.

그런데, 냉각팬을 청소목적으로 역회전시키는 경우 냉각팬의 특성상 풍량이 감소하여 냉각성능이 저하된다. 따라서 운전자가 부주의하여 냉각팬을 장시간 역회전시키는 상태로 방치하게 되면, 냉각이 필요한 부품을 냉각시키지 못하므로 장비가 과열되어 수명이 단축되거나 고장이 발생한다. 특히 고무재로 만들어진 부품은 열화되어 고장을 일으키는 문제점이 있었다. However, when the cooling fan is reversely rotated for cleaning purposes, the air volume decreases due to the characteristics of the cooling fan, thereby lowering cooling performance. Therefore, if the operator inadvertently leaves the cooling fan in a state of reverse rotation for a long time, the parts that need to be cooled cannot be cooled, so the equipment is overheated and the life is shortened or failure occurs. Particularly, parts made of rubber material have a problem of deterioration and failure.

이에 본 발명은 냉각팬을 소정의 주기로 정/역회전시켜 냉각팬의 일방향 작동에 따른 고장발생을 예방할 수 있는 건설중장비의 냉각팬 구동방법을 제공하는 것에 목적이 있다. Accordingly, an object of the present invention is to provide a cooling fan driving method of heavy equipment under construction which can prevent the occurrence of failure due to the one-way operation of the cooling fan by rotating the cooling fan in a predetermined cycle.

상기 목적을 달성하기 위한 본 발명은, The present invention for achieving the above object,

유압펌프에서 냉각팬 모터로 공급되는 압유의 흐름방향을 방향절환시키는 솔레노이드 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 증가하는 소정의 정방향 전류를 제공하여 냉각팬 모터를 정방향으로 가속회전시키는 단계(A)와, Accelerating rotation of the cooling fan motor in the forward direction by providing a predetermined forward current that increases at a constant rate for a predetermined time to the solenoid portion of the solenoid switching valve for redirecting the flow direction of the hydraulic oil supplied from the hydraulic pump to the cooling fan motor ( A) and,

상기 절환밸브의 솔레노이드부에 공급되는 정방향 전류를 소정의 시간동안 일정하게 유지시켜 냉각팬 모터를 정방향 정속회전시키는 단계(B)와, (B) rotating the cooling fan motor at a constant constant speed by maintaining a constant current supplied to the solenoid portion of the switching valve for a predetermined time;

상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 감소하는 소정의 정방향 전류를 제공하여 냉각팬모터를 감속회전시키는 단계(C)와, (C) decelerating and rotating the cooling fan motor by providing a predetermined forward current that decreases at a constant rate for a predetermined time to the solenoid portion of the switching valve;

상기 절환밸브의 솔레노이드부에 소정시간동안 전류를 차단하여 냉각팬 모터를 작동정지시키는 단계(D)와, (D) stopping operation of the cooling fan motor by cutting off current for a predetermined time in the solenoid portion of the switching valve;

상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 증가하는 역방향 전류를 제공하여 냉각팬을 소정시간동안 가속 역회전시키는 단계(E) 및(E) accelerating and rotating the cooling fan for a predetermined time by providing a reverse current that increases at a constant rate for a predetermined time to the solenoid portion of the switching valve;

상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 역방향 전류를 제공하여 냉각팬을 소정시간동안 일정한 속도로 역회전시키는 단계(F)가 순차적으로 진행되게 제어하는 것에 특징이 있다. It is characterized in that the step (F) of rotating the cooling fan at a constant speed for a predetermined time by providing a constant reverse current for a predetermined time to the solenoid portion of the switching valve is controlled to proceed sequentially.

상기한 바와 같이, 본 발명은 냉각팬을 교대반복하여 정회전 또는 역회전시킴으로써 건설중장비의 냉각과 청소를 주기적으로 수행하므로 운전자가 잊고 있더라도 자동으로 방향전환되어 안전사고를 예방할 수 있다. As described above, since the present invention periodically performs cooling and cleaning of the heavy construction equipment by alternately repeating the cooling fan and rotating it forward or reverse, it is automatically switched to prevent the accident even if the driver forgets.

특히, 정방향회전에서 역방향 회전으로 전환할 때 일시적으로 냉각팬 모터를 정지시켜 갑작스러운 회전방향 변경에 따르는 충격을 방지하여 내구성을 향상시킨다. Particularly, when switching from forward rotation to reverse rotation, the cooling fan motor is temporarily stopped to prevent shock caused by sudden rotational direction change, thereby improving durability.

이하, 본 발명의 실시예를 첨부도면에 따라 설명한다.Best Mode for Carrying Out the Invention Embodiments of the present invention will be described below with reference to the accompanying drawings.

도 2는 본 발명에 따라 냉각팬 구동모터를 제어하는 제어선도이다. 2 is a control diagram for controlling a cooling fan drive motor according to the present invention.

도 2에 도시된 바와 같이, 건설중장비의 냉각팬 구동시스템은, 유압펌프(1)와, 상기 유압펌프(1)에서 공급되는 압유의 공급방향에 따라 정방향 또는 역방향으로 구동되는 유압작동식 냉각팬모터(2)와, 상기 유압작동식 냉각팬모터(2)에 의해 구동되는 냉각팬(2A)과, 상기 유압펌프(1)에서 유압작동식 냉각팬모터(2)로 공급되는 압유의 공급방향을 전환시키는 절환밸브(10)와, 상기 절환밸브(10)에 전류를 제공하는 제어부(11A)를 포함한다. As shown in FIG. 2, the cooling fan drive system of the heavy construction equipment includes a hydraulic pump 1 and a hydraulically operated cooling fan driven in a forward or reverse direction according to a supply direction of the hydraulic oil supplied from the hydraulic pump 1. Supply direction of the hydraulic oil supplied to the motor 2, the cooling fan 2A driven by the hydraulically operated cooling fan motor 2, and the hydraulically operated cooling fan motor 2 from the hydraulic pump 1 Switching valve 10 for switching the and a control unit 11A for providing a current to the switching valve (10).

상기 제어부(11A)는 다음과 같은 일련의 순서에 따라 절환밸브(10)에 전류를 제공한다.The control unit 11A provides a current to the switching valve 10 in the following sequence.

제어부(11A)는, 유압펌프에서 냉각팬 모터로 공급되는 압유의 흐름방향을 방향절환시키는 솔레노이드 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 증가하는 소정의 정방향 전류를 제공하여 냉각팬 모터를 정방향으로 가속회전시키는 단계(A)와, The control unit 11A provides a predetermined forward current that increases at a constant rate for a predetermined time to provide a predetermined forward current to the solenoid of the solenoid switching valve for redirecting the flow direction of the hydraulic oil supplied from the hydraulic pump to the cooling fan motor. (A) to accelerate the rotation with;

상기 절환밸브의 솔레노이드부에 공급되는 정방향 전류를 소정의 시간동안 일정하게 유지시켜 냉각팬 모터를 정방향 정속회전시키는 단계(B)와, (B) rotating the cooling fan motor at a constant constant speed by maintaining a constant current supplied to the solenoid portion of the switching valve for a predetermined time;

상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 감소하는 소정 의 정방향 전류를 제공하여 냉각팬모터를 감속회전시키는 단계(C)와, (C) decelerating and rotating the cooling fan motor by providing a predetermined forward current that decreases at a constant rate for a predetermined time to the solenoid portion of the switching valve;

상기 절환밸브의 솔레노이드부에 소정시간동안 전류를 차단하여 냉각팬 모터를 작동정지시키는 단계(D)와, (D) stopping operation of the cooling fan motor by cutting off current for a predetermined time in the solenoid portion of the switching valve;

상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 증가하는 역방향 전류를 제공하여 냉각팬을 소정시간동안 가속 역회전시키는 단계(E) 및(E) accelerating and rotating the cooling fan for a predetermined time by providing a reverse current that increases at a constant rate for a predetermined time to the solenoid portion of the switching valve;

상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 역방향 전류를 제공하여 냉각팬을 소정시간동안 일정한 속도로 역회전시키는 단계(F)가 순차적으로 진행되게 제어한다. By providing a constant reverse current for a predetermined time to the solenoid portion of the switching valve to control the step (F) to rotate the cooling fan at a constant speed for a predetermined time to proceed sequentially.

그리고, 상기 단계(A) 내지 단계(F)가 미리 정해진 일정한 주기로 반복되게 제어한다. Then, the steps (A) to (F) are controlled to be repeated at a predetermined constant period.

이상과 같이, 본 발명은 냉각팬의 정회전 또는 역회전을 자동으로 반복시키므로 건설중장비의 냉각과 청소를 주기적으로 수행하고, 운전자가 잊고 있더라도 자동으로 방향전환되어 부품과열에 의한 안전사고를 예방할 수 있다. As described above, the present invention automatically repeats the forward or reverse rotation of the cooling fan to periodically perform the cooling and cleaning of the construction equipment, and even if the driver forgets to automatically change the direction to prevent safety accidents due to overheating of parts. have.

특히, 정방향회전에서 역방향 회전으로 전환할 때 일시적으로 냉각팬 모터를 정지시켜 갑작스러운 회전방향 변경에 따르는 충격을 방지하여 내구성을 향상시킨다. Particularly, when switching from forward rotation to reverse rotation, the cooling fan motor is temporarily stopped to prevent shock caused by sudden rotational direction change, thereby improving durability.

Claims (2)

유압펌프(1)에서 냉각팬 모터(2)로 공급되는 압유의 흐름방향을 솔레노이드 절환밸브(10)의 방향절환에 의해 전환하여 냉각팬을 정회전 또는 역회전시키는 건설중장비의 냉각팬 구동제어방법에 있어서,Cooling fan drive control method for construction equipment that changes the flow direction of the pressure oil supplied from the hydraulic pump (1) to the cooling fan motor (2) by the direction change of the solenoid switching valve 10 to rotate the cooling fan forward or reverse To 유압펌프에서 냉각팬 모터로 공급되는 압유의 흐름방향을 방향절환시키는 솔레노이드 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 증가하는 소정의 정방향 전류를 제공하여 냉각팬 모터를 정방향으로 가속회전시키는 단계(A)와, Accelerating rotation of the cooling fan motor in the forward direction by providing a predetermined forward current that increases at a constant rate for a predetermined time to the solenoid portion of the solenoid switching valve for redirecting the flow direction of the hydraulic oil supplied from the hydraulic pump to the cooling fan motor ( A) and, 상기 절환밸브의 솔레노이드부에 공급되는 정방향 전류를 소정의 시간동안 일정하게 유지시켜 냉각팬 모터를 정방향 정속회전시키는 단계(B)와, (B) rotating the cooling fan motor at a constant constant speed by maintaining a constant current supplied to the solenoid portion of the switching valve for a predetermined time; 상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 감소하는 소정의 정방향 전류를 제공하여 냉각팬모터를 감속회전시키는 단계(C)와, (C) decelerating and rotating the cooling fan motor by providing a predetermined forward current that decreases at a constant rate for a predetermined time to the solenoid portion of the switching valve; 상기 절환밸브의 솔레노이드부에 소정시간동안 전류를 차단하여 냉각팬 모터를 작동정지시키는 단계(D)와, (D) stopping operation of the cooling fan motor by cutting off current for a predetermined time in the solenoid portion of the switching valve; 상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 비율로 증가하는 역방향 전류를 제공하여 냉각팬을 소정시간동안 가속 역회전시키는 단계(E) 및(E) accelerating and rotating the cooling fan for a predetermined time by providing a reverse current that increases at a constant rate for a predetermined time to the solenoid portion of the switching valve; 상기 절환밸브의 솔레노이드부에 소정시간동안 일정한 역방향 전류를 제공하여 냉각팬을 소정시간동안 일정한 속도로 역회전시키는 단계(F)가 순차적으로 진행되게 제어하는 것을 특징으로 하는 건설중장비의 냉각팬 구동제어방법. Cooling fan drive control of the heavy construction equipment, characterized in that the step (F) to provide a constant reverse current for a predetermined time to the solenoid portion of the switching valve to rotate the cooling fan at a constant speed for a predetermined time to proceed sequentially Way. 제1항에 있어서, 상기 단계(A) 내지 단계(F)가 미리 정해진 일정한 주기로 반복되는 것을 특징으로 하는 건설중장비의 냉각팬 구동제어방법. The method of claim 1, wherein the steps (A) to (F) are repeated at predetermined predetermined periods.
KR1020050132466A 2005-12-28 2005-12-28 Apparatus for controlling driving a cooling fan drive in a construction heavy equipment KR100688662B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100943416B1 (en) 2008-05-07 2010-02-19 화남전자 주식회사 Control circuit of cooling fan for cleaning of radiator grille
KR20120072522A (en) * 2010-12-24 2012-07-04 두산인프라코어 주식회사 Control system for rotational direction of fan
KR20190056628A (en) * 2017-11-17 2019-05-27 현대건설기계 주식회사 Cooling apparatus for construction machinery

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KR20000012649A (en) * 1999-12-16 2000-03-06 허태학 Prevention Apparatus to be Frozen over Ventilation Fan for Cooling Tower
KR20030058383A (en) * 2001-12-31 2003-07-07 대우종합기계 주식회사 Apparatus for controlling driving a cooling fan drive in a construction heavy equipment
KR20060068755A (en) * 2004-12-17 2006-06-21 주식회사 대우일렉트로닉스 Reverse controlling method of cooling fan in the refrigeration
KR20060094327A (en) * 2005-02-24 2006-08-29 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Apparatus for controlling cooling-pan of construction equipment and method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000012649A (en) * 1999-12-16 2000-03-06 허태학 Prevention Apparatus to be Frozen over Ventilation Fan for Cooling Tower
KR20030058383A (en) * 2001-12-31 2003-07-07 대우종합기계 주식회사 Apparatus for controlling driving a cooling fan drive in a construction heavy equipment
KR20060068755A (en) * 2004-12-17 2006-06-21 주식회사 대우일렉트로닉스 Reverse controlling method of cooling fan in the refrigeration
KR20060094327A (en) * 2005-02-24 2006-08-29 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Apparatus for controlling cooling-pan of construction equipment and method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100943416B1 (en) 2008-05-07 2010-02-19 화남전자 주식회사 Control circuit of cooling fan for cleaning of radiator grille
KR20120072522A (en) * 2010-12-24 2012-07-04 두산인프라코어 주식회사 Control system for rotational direction of fan
KR101674219B1 (en) 2010-12-24 2016-11-08 두산인프라코어 주식회사 Control system for rotational direction of fan
KR20190056628A (en) * 2017-11-17 2019-05-27 현대건설기계 주식회사 Cooling apparatus for construction machinery
KR102316824B1 (en) 2017-11-17 2021-10-25 현대건설기계 주식회사 Cooling apparatus for construction machinery

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