KR20010063790A - Apparatus for driving a cooling fan motor of construction heavy equipment - Google Patents

Apparatus for driving a cooling fan motor of construction heavy equipment Download PDF

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Publication number
KR20010063790A
KR20010063790A KR1019990061883A KR19990061883A KR20010063790A KR 20010063790 A KR20010063790 A KR 20010063790A KR 1019990061883 A KR1019990061883 A KR 1019990061883A KR 19990061883 A KR19990061883 A KR 19990061883A KR 20010063790 A KR20010063790 A KR 20010063790A
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KR
South Korea
Prior art keywords
temperature
cooling fan
fan motor
oil
hydraulic oil
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KR1019990061883A
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Korean (ko)
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KR100730825B1 (en
Inventor
박찬일
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양재신
대우종합기계 주식회사
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Priority to KR1019990061883A priority Critical patent/KR100730825B1/en
Publication of KR20010063790A publication Critical patent/KR20010063790A/en
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Classifications

    • 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
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • 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
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • 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
    • F01P2070/00—Details
    • F01P2070/10—Details using electrical or electromechanical means

Abstract

PURPOSE: A cooling fan motor driving system of construction heavy equipment is provided to drive a cooling fan at proper time by operating the cooling fan depending on actual conditions including actual temperature of engine water, temperature of hydraulic oil or oil temperature of a torque converter. CONSTITUTION: A cooling fan motor driving system includes an engine water temperature sensor of detecting the temperature(T1) of engine water, a torque converter temperature sensor for measuring the temperature(T2) of torque converter oil and a hydraulic oil temperature sensor of sensing the temperature(T3) of hydraulic oil. The driving system has a fan motor control unit(130). The fan motor control unit compares the measured actual temperatures of engine water, torque converter oil and hydraulic oil with each maximum allowable temperature. If one of the detected temperatures exceeds the corresponding maximum temperature, corresponding current is calculated. The current is fed to an electronic proportional control valve(120). The temperature of refrigerant including engine oil falls by external air in winter. For that, the fan motor control unit reduces set pressure of a relief valve(110) by outputting a relatively weak current. Therefore, the RPM(Revolutions Per Minute) of a cooling fan motor(109) rises up slowly.

Description

건설중장비의 냉각팬모터 구동장치{Apparatus for driving a cooling fan motor of construction heavy equipment}Apparatus for driving a cooling fan motor of construction heavy equipment}

본 발명은 건설중장비의 냉각팬을 구동장치에 관한 것으로, 특히 엔진 냉각수의 온도나, 유압작동유의 온도 또는 토크컨버터의 오일의 온도 등에 따라 냉각팬의 회전수를 제어하는 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a cooling fan of construction equipment, and more particularly, to an apparatus for controlling the rotation speed of a cooling fan according to the temperature of engine coolant, the temperature of hydraulic oil or the temperature of oil of a torque converter.

일반적으로 건설중장비는 작업도중 엔진이나 작동유가 과열되는 경우 그 엔진냉각수나 작동유를 냉각시키는 냉각시키는 냉각장치를 구비하고 있는 데, 이 냉각장치는 통상 도 1에 도시된 바와 같은 구성으로 되어 있다.In general, the heavy equipment is provided with a cooling device for cooling the engine coolant or the hydraulic fluid when the engine or the hydraulic oil is overheated during operation, the cooling device is generally configured as shown in FIG.

즉 2개의 메인펌프(101)와 파이롯펌프(102) 및 냉각팬모터 구동용 보조펌프(103)가 1개의 엔진(104)에 트랜스미션(105)과 토크컨버터(106)을 통하여 연결되어 있고, 상기 보조펌프(103)는 압유라인(107)을 통하여 냉각팬(108)을 구동시키는 냉각팬 모터(109)와 연결되며, 상기 압유라인(107)에는 릴리이프밸브(110)가 설치되어 상기 압유라인(107)을 통하여 냉각팬 모터(109)에 공급되는 압유의 최대압력을 제한하게 되어 있다.That is, two main pumps 101, a pilot pump 102, and an auxiliary pump 103 for driving a cooling fan motor are connected to one engine 104 through a transmission 105 and a torque converter 106. The auxiliary pump 103 is connected to the cooling fan motor 109 for driving the cooling fan 108 through the oil pressure line 107, the relief valve 110 is installed in the oil pressure line 107 The maximum pressure of the hydraulic oil supplied to the cooling fan motor 109 through the oil pressure line 107 is limited.

여기서 상기 냉각팬(108)의 앞쪽에는 냉각대상부(115)로서, 엔진냉각수 라디에이터(111)와, 작동유 냉각용 열교환장치(112) 및 토오크컨버터 오일냉각용 열교환장치(113)가 설치되어 있다. 따라서 냉각팬(105)이 회전하여 강제송풍함으로써그 앞쪽에 위치한 라이에이터(111)의 냉각수, 작동유 냉각용 열교환장치(112)의 작동유 및 토오크컨버터 오일냉각용 열교환장치(11)의 오일을 냉각시킨다.In this case, an engine coolant radiator 111, a working oil cooling heat exchanger 112, and a torque converter oil cooling heat exchanger 113 are installed as a cooling target unit 115 in front of the cooling fan 108. Accordingly, the cooling fan 105 is rotated and forcedly blown to cool the coolant of the writer 111 located in front of the coolant, the hydraulic oil of the heat exchanger 112 for cooling the hydraulic fluid, and the oil of the heat exchanger 11 for torque converter oil cooling. .

그런데 상기 종래의 냉각팬 모터(109)는 도 2에 도시된 바와 같이, 라디에이터(111)의 냉각수, 작동유 및 토오크컨버터의 오일의 실제온도와는 무관하게 엔진(104)의 회전수에 따라 구동하게 되어 있으므로 냉각효율이 낮은 단점이 있었다. 즉 동절기에는 장비는 가동되고 있지만 냉매의 온도가 그다지 높지 않아 냉각할 필요가 없는 경우에도 엔진의 회전수에 따라 구동되어 냉매가 과냉되는 문제가 있고, 뿐만아니라 불필요하게 냉각팬이 회전함에 따라 팬회전 소음은 물론 에너지가 손실되는 단점이 있다.However, as shown in FIG. 2, the conventional cooling fan motor 109 is driven according to the rotational speed of the engine 104 irrespective of the actual temperature of the coolant, the hydraulic oil of the radiator 111 and the oil of the torque converter. There was a disadvantage of low cooling efficiency. In other words, even though the equipment is operating in winter, even if the temperature of the refrigerant is not so high that it is not necessary to cool it, it is driven by the engine speed and the refrigerant is supercooled. Noise as well as the energy is lost.

반면에 혹서기에는 외기온도의 영향에 따라 냉매의 온도가 높아서 냉각할 필요가 있음에도 불구하고 엔진 회전수는 높지 않는 경우 냉각팬이 회전하지 않아 엔진이나 작동유가 과열되는 문제가 있다.On the other hand, even in the cold weather, the cooling fan does not rotate when the engine speed is not high despite the need for cooling because the temperature of the refrigerant is high according to the influence of the outside temperature, there is a problem that the engine or the operating oil is overheated.

이에 본 발명은 상기 종래의 냉각팬 구동방식이 가진 단점을 해소하기 위하여 고안된 것으로, 냉각팬 구동에 필요한 조건, 즉 엔진 냉각수의 실제온도나 작동유의 온도 또는 토오크컨버터의 오일온도 등과 같이 실제 조건에 따라 작동하여 적시에 냉각팬을 구동시키는 냉각팬 구동장치를 공함에 목적이 있다.Accordingly, the present invention is designed to solve the disadvantages of the conventional cooling fan driving method, according to the conditions necessary for driving the cooling fan, that is, according to actual conditions such as the actual temperature of the engine coolant, the temperature of the working oil or the oil temperature of the torque converter The purpose is to provide a cooling fan drive that operates to drive the cooling fan at the right time.

상기 목적을 달성하기 위한 본 발명의 장치는 엔진냉각수 온도 감지센서와, 트랜스미션 오일온도 감지센서와, 작동유온도 감지센서를 더 포함하고, 상기 릴리이프밸브는 파이롯펌프의 파이롯압력에 따라 설정압력이 가변되는 파이롯 가변릴리이프밸브로 구성되며, 입력전류의 세기에 따라 상기 가변릴리이프밸브에 가해지는 파이롯펌프의 파이롯압력을 제어하는 전자비례제어밸브를 포함하고, 상기 엔진냉각수 온도감지센서에서 감지한 엔진냉각수 실제온도와, 트랜스미션 오일온도 감지센서에서 감지한 트랜스미션 오일온도와, 유압작동유 온도감지센서에서 감지한 유압작동유 온도를 설정된 각각의 허용 최고온도와를 비교하여 상기 감지온도중 어느 하나의 감지온도가 그의 허용 최고온도를 초과하는 경우 그 온도차이에 해당하는 전류값을 발생시켜 그 전류값을 상기 전자비례제어밸브에 인가하는 컨트롤러를 포함한 구성으로 된다.The apparatus of the present invention for achieving the above object further comprises an engine coolant temperature sensor, a transmission oil temperature sensor, a hydraulic oil temperature sensor, the relief valve is set pressure according to the pilot pressure of the pilot pump The variable pilot variable relief valve comprises an electronic proportional control valve for controlling a pilot pressure of a pilot pump applied to the variable relief valve according to the strength of the input current, the engine coolant temperature sensing The actual temperature of the engine coolant detected by the sensor, the transmission oil temperature detected by the transmission oil temperature sensor, and the hydraulic oil temperature detected by the hydraulic oil temperature sensor are compared with the set allowable maximum temperatures. If a sensed temperature exceeds its maximum allowable temperature, a current value corresponding to that temperature difference is generated. To be a structure including a controller for applying the current to the electro-proportional control valve.

상기와 같이 구성되는 본 발명의 냉각팬 구동장치에 따르면, 냉각이 필요한 조건을 자동으로 감지하여 냉각이 필요한 경우에만 냉각팬을 회전구동하게 함으로써 엔진이나 작업장치의 작동유 등이 과열되지 않게 하고, 불필요하게 회전하는 냉각팬의 소음을 줄일 수 있는 동시에 에너지 낭비를 줄일 수 있다.According to the cooling fan drive device of the present invention configured as described above, by automatically detecting a condition that requires cooling to rotate the cooling fan only when cooling is required to prevent the operating oil, such as the engine or work equipment from overheating, unnecessary It is possible to reduce the noise of the rotating cooling fan while reducing energy waste.

도 1은 종래 냉각팬 모터 구동장치를 개략적으로 도시한 유압회로도,1 is a hydraulic circuit diagram schematically showing a conventional cooling fan motor drive device;

도 2는 도 1에 도시된 종래 냉각팬 구동장치에서 엔진회전수에 대한 냉각팬 동작특성을 도시한 그래프,Figure 2 is a graph showing the cooling fan operating characteristics for the engine speed in the conventional cooling fan drive shown in Figure 1,

도 3는 본 발명에 따른 냉각팬 구동장치의 개략적인 구성도,3 is a schematic configuration diagram of a cooling fan driving apparatus according to the present invention;

도 4는 본 발명에 따라 작동하는 냉각팬 모터의 엔진회전수에 대한 특성선도이다.4 is a characteristic diagram of the engine speed of a cooling fan motor operating in accordance with the present invention.

* 도면의 주요부분에 대한 부호의 설명** Explanation of symbols for the main parts of the drawings *

101,102,103: 유압펌프 104: 엔진101, 102, 103: hydraulic pump 104: engine

105: 트랜스미션 106: 토오크컨버터105: transmission 106: torque converter

107: 압유라인 108: 냉각팬107: oil pressure line 108: cooling fan

109: 냉각팬 모터 110: 릴리이프밸브109: cooling fan motor 110: relief valve

110a: 파이롯수압부 111: 엔진냉각수 라디에이터110a: pilot water pressure unit 111: engine coolant radiator

112: 작동유 냉각용 열교환장치 113: 토오크컨버터 오일 열교환장치112: heat exchanger for working oil cooling 113: torque converter oil heat exchanger

115: 냉각대상부115: cooling target

120: 파이롯라인 121: 전자비례제어밸브120: pilot line 121: electronic proportional control valve

130: 컨트롤러 T1: 엔진냉각수 온도130: controller T1: engine coolant temperature

T2: 작동유 온도 T3: 토오크컨버터 오일온도T2: Working oil temperature T3: Torque converter oil temperature

이하, 본 발명에 따른 냉각팬 구동장치에 대한 실시예를 첨부도면에 따라 상세히 설명한다.Hereinafter, an embodiment of a cooling fan driving apparatus according to the present invention will be described in detail according to the accompanying drawings.

도 3에 도시된 바와 같이, 2개의 메인펌프(101)와 파이롯펌프(102) 및 냉각팬모터 구동용 보조펌프(103)가 1개의 엔진(104)에 트랜스미션(105)과 토크컨버터(106)을 통하여 연결되어 있고, 상기 보조펌프(103)는 압유라인(107)을 통하여 냉각팬(108)을 구동시키는 냉각팬 모터(109)와 연결되며, 상기 압유라인(107)에는 설정압력을 가변시킬 수 있는 파이롯 가변 릴리이프밸브(110)가설치되어 있다.As shown in FIG. 3, two main pumps 101, a pilot pump 102, and an auxiliary pump 103 for driving a cooling fan motor are connected to a transmission 105 and a torque converter 106 in one engine 104. The auxiliary pump 103 is connected to the cooling fan motor 109 for driving the cooling fan 108 through the oil pressure line 107, the set pressure in the oil pressure line 107 The pilot variable relief valve 110 that can be varied is installed.

상기 파이롯 가변 릴리이프밸브(110)는 그 파이롯수압부(110a)가 파이롯라인(120)을 통하여 파이롯펌프의 출구와 연결되고, 상기 파이롯라인(120)상에는 후술하는 컨트롤러(130)의 출력전류의 세기에 비례하여 파이롯라인(120)의 파이롯압유의 압력을 제어하는 비례제어밸브(121)가 설치된다.The pilot variable relief valve 110 is connected to the outlet of the pilot pump through a pilot line 110a of the pilot line 120, the controller 130 to be described later on the pilot line 120 Proportional control valve 121 for controlling the pressure of the pilot pressure oil of the pilot line 120 in proportion to the intensity of the output current of the) is installed.

따라서 상기 비례제어밸브(121)는 컨트롤러(130)로부터 출력전류을 받아서 그 전류세기에 비례하여 파이롯압유의 압력을 제어한 다음, 이 파이롯압유를 상기 가변 릴리이프밸브(110)의 파이롯수압부(110a)에 작용시키게 되고 이에 따라 상기 가변 릴리이프밸브(110)의 릴리이프 설정압력이 가변되게 된다.Accordingly, the proportional control valve 121 receives the output current from the controller 130 and controls the pressure of the pilot pressure oil in proportion to its current strength, and then converts the pilot pressure oil into a pilot pressure part of the variable relief valve 110. The relief set pressure of the variable relief valve 110 is varied according to the act on the 110a.

그리고 상기 냉각팬(108)의 앞쪽에는 냉각대상부(115)로서, 엔진냉각수 라디에이터(111)와, 작동유 냉각용 열교환장치(112) 및 토오크컨버터 오일냉각용 열교환장치(113)가 설치되어 있다.In addition, an engine coolant radiator 111, a working oil cooling heat exchanger 112, and a torque converter oil cooling heat exchanger 113 are installed as a cooling target unit 115 in front of the cooling fan 108.

그리고 본 발명은 엔진의 냉각수 온도(T1)를 감지하는 엔진냉각수 온도 감지센서와, 트랜스미션 오일의 온도(T2)를 감지하는 트랜스미션 오일온도 감지센서와, 유압작동유의 온도(T3)를 감지하는 작동유온도 감지센서를 포함한다.And the present invention is the engine coolant temperature sensor for detecting the coolant temperature (T1) of the engine, the transmission oil temperature sensor for detecting the temperature (T2) of the transmission oil, the hydraulic oil temperature for detecting the temperature (T3) of the hydraulic oil It includes a sensing sensor.

또한 본 발명은 컨트롤러(130)를 구비하고, 이 컨트롤러(130)는 상기 엔진냉각수 온도감지센서에서 감지한 엔진냉각수 실제온도(T1)와, 트랜스미션 오일온도 감지센서에서 감지한 트랜스미션 오일온도(T2)와, 유압작동유 온도감지센서에서 감지한 유압작동유 온도(T3)를 설정된 각각의 허용 최고온도(T1max,T2max,T3max)와 비교하여 상기 감지온도(T1,T2,T3)중 어느 하나의 감지온도가 그의 허용최고온도(T1max,T2max,T3max)를 초과하는 경우 그 온도차이에 대응하는 전류값을 연산하여 그 전류값을 상기 전자비례제어밸브(120)에 인가하게 된다.In addition, the present invention includes a controller 130, the controller 130 is the engine coolant actual temperature (T1) detected by the engine coolant temperature sensor, and the transmission oil temperature (T2) detected by the transmission oil temperature sensor And a sensing temperature of any one of the sensing temperatures T1, T2, and T3 is compared with the set allowable maximum temperatures T1max, T2max, and T3max of the hydraulic oil temperature T3 sensed by the hydraulic oil temperature sensing sensor. When the allowable maximum temperature (T1max, T2max, T3max) is exceeded, a current value corresponding to the temperature difference is calculated and the current value is applied to the electromagnetic proportional control valve 120.

즉 도 4에 도시된 바와 같이, 하절기의 경우에는 장비를 조금만 운전시켜도( 즉 낮은 엔진회전수에도) 외기온도의 영향으로 상기 각 온도감지센서에서 감지한 감지온도가 허용 최고온도보다 높게 되고, 이에 따라 컨트롤러(130)에서 전자비례제어밸브(121)로 출력하는 전류의 세기가 크므로, 이에 따라 비례제어밸브(121)를 통하여 릴리이프밸브(110)에 가해지는 파이롯압력이 높아져 상기 릴리이프밸브(110)의 설정압력이 높게 설정된다. 따라서 냉각팬 구동모터(109)의 구동 회전수는 도 4의 b 그래프를 따라 엔진회전수에 대하여 급격히 증가하여 냉각팬(108)의 송풍력은 크게 된다.In other words, as shown in Figure 4, even in the summer season, even if the equipment is operated only a little (that is, even at low engine speed), due to the influence of the outside temperature, the detected temperature detected by each temperature sensor is higher than the maximum allowable temperature, Accordingly, since the intensity of the current output from the controller 130 to the electromagnetic proportional control valve 121 is large, the pilot pressure applied to the relief valve 110 through the proportional control valve 121 is increased accordingly. The set pressure of the valve 110 is set high. Accordingly, the driving speed of the cooling fan drive motor 109 increases rapidly with respect to the engine speed along the b graph of FIG. 4 so that the blowing force of the cooling fan 108 becomes large.

반면 동절기의 경우에는 장비 운전전의 냉각수 등 냉매의 온도가 외기온도의 영향으로 낮으므로 장비를 장시간 운전하여도 온도는 그다지 높아지지 않는다. 이 경우 컨트롤러(130)는 상대적으로 약한 전류를 출력하여 릴리이프밸브(110)의 설정압력을 낮추어주므로 냉각팬 모터(109)의 회전수는 도 4의 C 직선을 따라 완만하게 증가한다.On the other hand, in winter, the temperature of the coolant such as the coolant before the operation of the equipment is low due to the influence of the outside temperature, so the temperature does not increase even if the equipment is operated for a long time. In this case, since the controller 130 outputs a relatively weak current to lower the set pressure of the relief valve 110, the rotation speed of the cooling fan motor 109 gradually increases along the straight line C of FIG. 4.

상기한 바와 같은 본 발명은 엔진냉각수온도, 유압작동유온도 또는 토오크컨버터의 오일온도 등과 같이 냉각이 필요한 조건을 자동으로 감지하여 냉각이 필요한 경우에만 냉각팬을 회전구동하게 함으로써 엔진이나 작업장치의 작동유 등이 과열되지 않게 하고, 불필요하게 회전하는 냉각팬의 소음을 줄일 수 있는 동시에에너지 낭비를 줄일 수 있다.As described above, the present invention automatically detects a condition that requires cooling, such as an engine coolant temperature, a hydraulic oil temperature, or an oil temperature of a torque converter to automatically drive a cooling fan only when cooling is required, such as operating oil of an engine or a work device. This prevents overheating and reduces the noise of the undesirably rotating cooling fan, while reducing energy waste.

Claims (3)

엔진(104)과 냉각대상부(115)를 구비하고, 상기 엔진(104)의 회전력을 전달받아 압유를 토출하는 유압펌프(103)와, 상기 유압펌프(103)에서 공급되는 압유에 의해 냉각팬(108)을 회전시켜 상기 냉각대상부(115)를 냉각시키는 냉각팬 모터(109)를 포함한 냉각팬 구동장치에 있어서,The engine 104 and the cooling target unit 115, the hydraulic pump 103 for receiving the rotational force of the engine 104 to discharge the hydraulic oil, and the cooling fan by the hydraulic oil supplied from the hydraulic pump 103 In the cooling fan drive device including a cooling fan motor 109 for rotating the 108 to cool the cooling target unit 115, 상기 냉각대상부(115)의 온도를 감지하는 온도감지부와,A temperature sensing unit sensing a temperature of the cooling target unit 115; 상기 온도감지부에서 검출된 온도에 따라 상기 유압펌프(103)으로 공급되는 압유의 량을 조절하는 유량제어수단을 포함하는 것을 특징으로 하는 중장비의 냉각팬 구동장치.And a flow rate control means for adjusting the amount of pressure oil supplied to the hydraulic pump 103 according to the temperature detected by the temperature sensing unit. 제1항에 있어서, 상기 온도감지부는 엔진냉각수 온도 감지센서와, 트랜스미션 오일온도 감지센서와, 작동유온도 감지센서로 구성된 것을 특징으로 하는 중장비의 냉각팬 구동장치.The apparatus of claim 1, wherein the temperature detector comprises an engine coolant temperature sensor, a transmission oil temperature sensor, and a hydraulic oil temperature sensor. 제1항에 있어서, 상기 유량제어수단은 상기 냉각팬 모터(109)에 공급되는 압유의 유로상에 최대압력을 제어하는 가변 릴리이프밸브(110)를 부설하고,According to claim 1, wherein the flow rate control means is provided with a variable relief valve 110 for controlling the maximum pressure on the flow path of the hydraulic oil supplied to the cooling fan motor 109, 상기 가변 릴리이프밸브(110)는 파이롯펌프(102)로 부터 파이롯라인(120)을 통해 파이롯압력을 공급받아 설정압력이 가변되어지게 하되, 상기 파이롯라인(120) 상에는 상기 파이롯압력을 제어하는 전자비례제어밸브(121)를 부설하며,The variable relief valve 110 receives a pilot pressure from a pilot pump 102 through a pilot line 120 so that a set pressure is varied, and the pilot line 120 is mounted on the pilot line 120. Install an electronic proportional control valve 121 for controlling the pressure, 상기 전자비례제어밸브(121)에는 상기 온도감지부의 온도가 미리 설정된 허용 최고온도(Tmax)를 초과하는 경우 그 온도차이에 해당하는 전류값을 출력하는 컨트롤러(130)로 부터 전류신호를 인가받아 제어되게 구성된 것을 특징으로 하는 중장비의 냉각팬 구동장치.The electronic proportional control valve 121 is controlled by receiving a current signal from the controller 130 that outputs a current value corresponding to the temperature difference when the temperature detection unit exceeds a preset maximum allowable temperature (Tmax). Cooling fan drive device, characterized in that configured to be.
KR1019990061883A 1999-12-24 1999-12-24 Apparatus for driving a cooling fan motor of construction heavy equipment KR100730825B1 (en)

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KR100678832B1 (en) * 2002-12-10 2007-02-05 현대중공업 주식회사 2 Stage Engine Power depend on transmission gear stage in wheel loader and method
KR100723580B1 (en) * 2005-04-20 2007-06-04 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 A method and apparatus for cooling fan rpm control for heavy equipment
KR100849502B1 (en) * 2007-07-11 2008-07-31 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Control method of cooling fan speed of excavator
KR100988406B1 (en) * 2003-11-29 2010-10-18 두산인프라코어 주식회사 Apparatus for driving a cooling fan motor of construction heavy equipment
KR20140124944A (en) * 2013-04-16 2014-10-28 두산인프라코어 주식회사 System for preventing over-heating of Hydraulic assembly
CN106837825A (en) * 2017-02-21 2017-06-13 北京航天发射技术研究所 One kind transmission cooling system and cooling control method

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KR100678832B1 (en) * 2002-12-10 2007-02-05 현대중공업 주식회사 2 Stage Engine Power depend on transmission gear stage in wheel loader and method
KR100988406B1 (en) * 2003-11-29 2010-10-18 두산인프라코어 주식회사 Apparatus for driving a cooling fan motor of construction heavy equipment
KR100723580B1 (en) * 2005-04-20 2007-06-04 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 A method and apparatus for cooling fan rpm control for heavy equipment
KR100849502B1 (en) * 2007-07-11 2008-07-31 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Control method of cooling fan speed of excavator
KR20140124944A (en) * 2013-04-16 2014-10-28 두산인프라코어 주식회사 System for preventing over-heating of Hydraulic assembly
CN106837825A (en) * 2017-02-21 2017-06-13 北京航天发射技术研究所 One kind transmission cooling system and cooling control method
CN106837825B (en) * 2017-02-21 2019-08-20 北京航天发射技术研究所 A kind of transmission cooling system and cooling control method

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