KR880000928B1 - Cooling device for lubricating oil of steam turbine - Google Patents

Cooling device for lubricating oil of steam turbine Download PDF

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KR880000928B1
KR880000928B1 KR7904130A KR790004130A KR880000928B1 KR 880000928 B1 KR880000928 B1 KR 880000928B1 KR 7904130 A KR7904130 A KR 7904130A KR 790004130 A KR790004130 A KR 790004130A KR 880000928 B1 KR880000928 B1 KR 880000928B1
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oil
lubricating oil
cooler
coolers
commercial
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KR7904130A
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KR830001492A (en
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다니 도요유끼 무까이
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요시야마 히로기찌
가부시기 가이샤 히다찌세이사꾸쇼
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/18—Lubricating arrangements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

A pipe (9) is connected to the oil cooler (1) and the lubricant is supplied to the oil coolers (1) (2). The four-way valves (15)(16) are installed respectively on the tributary point and the junction point. The oil pipe (13) which supplies lubricant is installed between the four-way valves (15)(16). The manipulation of foru-way valves is achieved by the signal which is generated by the turbine stop circuit (22) or the switch circuit (21) of the oil cooler.

Description

증기터빈의 윤활유 냉각장치Lubricant cooler of steam turbine

제1도는 종래의 일반적인 윤활유 냉각장치의 개략도.1 is a schematic diagram of a conventional general lubricant cooling device.

제2도 및 제3도는 본 발명의 1실시예를 나타낸 윤활유 냉각장치의 계통도이다.2 and 3 are schematic diagrams of a lubricating oil cooling device showing an embodiment of the present invention.

본 발명은 화력발전 플랜트에서의 증기 터빈의 윤활유 냉각장치에 관한 것이다.The present invention relates to a lubricating oil cooling device of a steam turbine in a thermal power plant.

현재까지는 야간 또는 주말에 정지시키는 중간부하, 피크부하용으로 계획되는 플랜트가 증가하고 있으며, 이들의 증기터빈의 기동 정지 횟수가 종래의 기계에 비하여 너무 많으며 그 구조나 계통에 여러가지 대책이 요구되고, 그 대책의 하나로 터빈 윤활유의 급유 대책이 있다. 터빈 차축 베어링부의 유막파괴에 의한 베어링 소손사고는 터빈정지 동작후의 감속시에 발생하는 경우가 많으며 기동 정지의 빈도가 잦은 터빈에는 특별한 대책이 강구된다. 베어링 소손방지 대책으로서는, 급유 온도를 저하시켜 윤활유의 점도를 높히는 방법과 종래의 재킹오일펌프를 설치하는 방법등이 있으나 재킹 오일펌프는 사용빈도가 높을 경우 신뢰성이 결핍되기 때문에 완전하다고는 말할 수 없다.Until now, more and more plants are planned for medium loads and peak loads that are stopped at night or on weekends.The number of starting and stopping of these steam turbines is too high compared to conventional machines, and various measures are required for the structure and system. One of the countermeasures is to refuel turbine lubricants. Bearing damage caused by oil film breakage of the turbine axle bearing part often occurs during deceleration after turbine stop operation, and special countermeasures are taken for turbines with frequent frequency of stopping. The countermeasures against bearing burnout include lowering the oil supply temperature to increase the viscosity of the lubricating oil, and installing conventional jacking oil pumps. However, the jacking oil pump is perfect because it lacks reliability when the frequency of use is high. none.

따라서 저온 급유를 그 대응책으로 하지 않으면 안 된다. 종래의 대표적인 윤활유의 냉각 계통을 제1도에 나타낸다. 오일냉각기(1), (2)는 각각 100%의 냉각 용량을 가지고 있으며, 상용으로서 1대와 예비용으로서 1대를 적합하게 대체하여 교대로 운전한다. 이 도면에서는 오일냉각기(1)가 운전중이고, 오일냉각기(2)는 예비 냉각기로 되어 있다. 오일펌프(3)에서 승압된 윤활유는 변환밸브(4)를 통해서 오일배관(5), (6)을 경유하여 오일냉각기(1)로 들어간다. 오일냉각기(1)의 내부에서 윤활유는 냉각수 배관(11)에 의해 공급되는 냉각수에 의하여 적합한 급유온도로 냉각되며, 변환밸브(4)를 통해서 오일배관(7), (8)을 경유하여 베어링에 급유된다. 오일냉각기(1)를 사용하는 경우는 변환밸브(4)를 회동시켜 윤활유가 오일배관(5), (9), (10), (8)순으로 흐르게 하는 계통으로 하고 동시에 냉각수도 냉각수 배관(12)으로 공급하여 급유온도를 유지하게 한다.Therefore, low temperature lubrication must be taken as a countermeasure. The cooling system of the conventional typical lubricating oil is shown in FIG. The oil coolers (1) and (2) each have a cooling capacity of 100%, and are operated alternately by appropriately replacing one for commercial use and one for spare use. In this figure, the oil cooler 1 is in operation, and the oil cooler 2 is a preliminary cooler. The lubricating oil boosted by the oil pump (3) enters the oil cooler (1) via the oil pipes (5) and (6) through the conversion valve (4). In the oil cooler (1), the lubricating oil is cooled to a suitable oil supply temperature by the cooling water supplied by the cooling water pipe (11), and is transferred to the bearing via the oil pipes (7) and (8) through the conversion valve (4). It is refueled. In the case of using the oil cooler (1), the conversion valve (4) is rotated so that the lubricating oil flows in the order of the oil pipes (5), (9), (10), and (8). 12) to maintain the oil supply temperature.

터빈 정지시의 속도를 낮출때의 요구 급유온도는 터빈 차축의 회전수에 따라 다르지만, 저속시에는 통상 운전시의 약 45℃에 대하여 약 30℃가 되고 감속시간도 온도차에 의해 구하게 되는 필요냉각용량이 통상의 운전시의 냉각용량의 약 2배로 된다.The required oil supply temperature at the time of slowing down the turbine depends on the rotational speed of the turbine axle, but at low speed it is about 30 ° C to about 45 ° C in normal operation, and the required cooling capacity is also determined by the temperature difference. This is about twice the cooling capacity in normal operation.

따라서 제1도에 나타낸 종래의 계통이라면, 오일 냉각기는 종래의 약 2배의 냉각면적을 가지도록 할 필요가 있으며, 터빈 정지시 단기간의 운전을 위하여 통상시에는 실제용량의 약 빈용량으로 운전해야 한다는 비경제적인 장치로 하지 않을 수 없게 된다.Therefore, in the conventional system shown in FIG. 1, the oil cooler needs to have a cooling area about twice that of the conventional one, and in order to operate for a short time when the turbine is stopped, the oil cooler should be operated at about the empty capacity of the actual capacity in normal times. It is inevitably forced to be an uneconomical device.

또한 종래의 방식에서는 변환밸브(4)를 반쯤 개방하여 2대의 오일냉각기에 동시에 윤활유를 흘리는 2대의 병렬 운전도 가능하지만, 오일 냉각기 내에서의 오일유속의 저하에 의하여 열의 관류율이 약 30%정도 저하하기 때문에 오일 냉각기의 용량을 약 30%정도 증가시켜야 한다. 그리고 오일 냉각기는 통상 오일 탱크내에 설치되어 있으므로 그의 용량 증대는 오일탱크의 대형화를 초래하게 된다. 오일냉각기를 증대시키지 않고 베어링의 급유 계통으로 별도의 열교환기를 설치하여 용량부족분을 보충하는 대책도 있으나, 비경제적일 뿐만 아니라, 사용률이 낮은 장치인 관계로 큰 배치공간을 필요로 함으로써 실용적이 되지 못한다.In addition, in the conventional method, two parallel operations of simultaneously lubricating oil to two oil coolers by opening the conversion valve 4 halfway are possible, but the heat permeation rate of the oil cooler decreases by about 30% due to the decrease in the oil flow rate in the oil cooler. Therefore, the capacity of the oil cooler should be increased by about 30%. And since the oil cooler is usually installed in the oil tank, increasing its capacity will result in an enlargement of the oil tank. There is a countermeasure to compensate for the lack of capacity by installing a separate heat exchanger as a bearing oil supply system without increasing the oil cooler, but it is not economical and it is not practical because it requires a large layout space because it is a low utilization device. .

본 발명의 목적은 윤활유 냉각장치의 용량을 증대시키지 않고, 증기 터빈의 감속시에 있어서의 윤활유 냉각 계통이 필요로 하는 요구 급유온도를 갖도록 저온의 윤활유를 충분히 공급할 수 있는 윤활유 냉각장치를 제공하는데 있다.An object of the present invention is to provide a lubricating oil cooling device capable of sufficiently supplying a low temperature lubricating oil so as to have a required oil supply temperature required by the lubricating oil cooling system at the time of deceleration of a steam turbine without increasing the capacity of the lubricating oil cooling device. .

상기 목적을 달성하기 위하여 본 발명은 다음과 같은 구성을 가진다.In order to achieve the above object, the present invention has the following configuration.

즉, 상용 및 예비의 오일 냉각기를 구비한 증기 터빈의 윤활유 냉각장치에 있어서, 상기 상용 및 예비의 오일 냉각기에 공히 연통되어 윤활유를 공급하는 분기부와 상기 오일 냉각기로 부터 냉각된 윤활유를 윤활부로 유도하는 오일 냉각기에 공히 연통시킨 함류배관의 합류부와 이 합류부에 설치한 각각의 유로변환 다방향 밸브와 이들 유로변환 다방향 밸브 사이를 직접 연결하는 오일배관이 배설되어 상기의 변환 다방향 밸브의 제1의 조작 위치에 대하여 상용의 오일 냉각기에만 윤활유를 공급하며, 상기의 변환밸브의 제2의 조작위치에 의하여 예비의 오일냉각기에만 윤활유를 공급하며, 변환밸브의 제3조작위치에 의하여 상용 및 예비의 오일 냉각기에 윤활유가 직렬로 통과하여 공급되도록 한 것을 특징으로 하는 증기 터빈의 윤활유 냉각장치를 제공하는 것이다.That is, in a lubricating oil cooling device of a steam turbine having commercial and spare oil coolers, a branch part which is in communication with the commercial and spare oil coolers and supplies lubricating oil and guides the lubricating oil cooled from the oil cooler to the lubricating part. The confluence part of the condensing pipe which is in communication with the oil cooler, and the oil conduit which connects directly between each flow path conversion multidirectional valve installed in this confluence, and these flow path conversion multidirectional valves, are provided. Lubricating oil is supplied only to a commercial oil cooler with respect to the first operating position, and lubricating oil is supplied only to the spare oil cooler by the second operating position of the conversion valve. Lubricant cooler of the steam turbine, characterized in that the lubricating oil is supplied to the spare oil cooler in series pass To provide.

이하 도면을 이용하여 본 발명의 실시예를 설명한다. 도면에서 오일냉각기(1), (2)는 증기 터빈이 통상 운전시에 윤활유 냉각 계통이 필요로 하는 윤활유량의 100%의 냉각 용량을 개별적으로 갖고 있으며, 통상 한쪽이 상용으로, 다른쪽은 예비용으로 하여, 적합하게 변환 운전하게 된다. 그리고 오일펌프(3)를 구비한 오일배관(5)은 오일배관(6)과 배관(9)로 분기되고, 배관(6)이 오일냉각기(1)로 연통되고, 배관(9)이 오일냉각기(2)로 연통되어 윤활유를 오일 냉각기(1), (2)에 개별적으로 유입하도록 되어 있다. 오일 냉각기(1), (2)를 거쳐 냉각된 윤활유는 각각 오일배관(7), (10)을 통해 도출되어 오일배관(8)에서 합류하여서 윤활유 계통(도시 않음)에 공급되도록 되어 있다. 또한 상기한 오일 배관(5)의 분기점 및 오일 배관(8)의 합류점에는 각각 4방향 변환 밸브(15), (16)가 설치되어 있으며, 또한 이들 4방향 변환밸브(15), (16)들 사이에는 윤활유를 유통시키는 오일배관(13)이 배설되어 있다. 4방향 변환밸브(15), (16)의 밸브의 변환조작은 터빈 정지회로(22) 또는 오일냉각기 변환 회로(21)에서 발생되는 신호에 의하여 변환되도록 되어 있다.Embodiments of the present invention will be described below with reference to the drawings. In the drawing, the oil coolers 1 and 2 individually have a cooling capacity of 100% of the amount of lubricating oil required by the lubricating oil cooling system in a steam turbine in normal operation. At cost, the conversion operation is performed suitably. The oil pipe (5) having the oil pump (3) branches into the oil pipe (6) and the pipe (9), the pipe (6) communicates with the oil cooler (1), and the pipe (9) is the oil cooler. In communication with (2), the lubricating oil is introduced into the oil coolers (1) and (2) separately. The lubricating oil cooled through the oil coolers (1) and (2) is drawn out through the oil pipes (7) and (10), respectively, and joins in the oil pipe (8). It is intended to be supplied to a system (not shown). In addition, four-way change valves 15 and 16 are provided at branch points of the oil pipe 5 and confluence points of the oil pipe 8, respectively, and these four-way change valves 15 and 16 are also provided. The oil piping 13 which distributes lubricating oil is arrange | positioned in between. The conversion operation of the valves of the four-way conversion valves 15 and 16 is converted by signals generated by the turbine stop circuit 22 or the oil cooler conversion circuit 21.

오일냉각기(1)에는 밸브(23)가 구비된 냉각수 배관(11)이 배설되어 있으며 오일냉각기(2)에는 밸브(24)가 구비된 냉각수 배관(12)이 배설되어 있고, 이들 밸브(23), (24)는 오일냉각기 변환회로(21) 또는 터빈 정지회로(22)의 신호에 의하여 조작되도록 되어 있다. 즉 본원 발명의 윤활유 냉각장치는 상기 구성으로 되어 소정의 운전을 가능하게 한 것이다.The oil cooler 1 is provided with a coolant pipe 11 provided with a valve 23, and the oil cooler 2 is provided with a coolant pipe 12 provided with a valve 24, and these valves 23 are provided. And 24 are operated by signals of the oil cooler conversion circuit 21 or the turbine stop circuit 22. That is, the lubricating oil cooling device of the present invention is configured as described above to enable predetermined operation.

제2도는 통상 운전중의 계통을 나타낸 도면으로 밸브들은 제1조작위치로 운전조작한 것이다. 즉 오일냉각기(1)가 운전중이고, 오일냉각기(2)는 예비기가 된다. 윤활유는 오일펌프(3)에 의해 4방향 변환 밸브(15)를 통해 오일 배관(5), (6)을 경유하여 오일냉각기(1)로 들어가 냉각된 후에 4방향 변환밸브(16)를 통해서 오일 배관(7), (8)을 경유하여 베어링에 급유된다. 그리고 오일냉각기의 변환 조작을 행하여 밸브들을 제2조작 위치로 운전조작할 경우에는 오일 냉각기의 변환회로(21)의 신호에 의해 4방향 변환밸브(15), (16)을 모두 90˚회전시키고 밸브(23), (24)를 역 조작하여 냉각수의 공급을 냉각수 배관(11)으로 부터 배관(12)으로 변환하면 오일 냉각기(2)가 운전되고, 오일냉각기(1)는 예비기가 되는 운용이 된다.2 is a diagram showing a system during normal operation, in which valves are operated to a first operation position. That is, the oil cooler 1 is in operation, and the oil cooler 2 becomes a preliminary stage. The lubricating oil enters the oil cooler (1) via the oil pipe (5) and (6) by the oil pump (3) via the oil pipe (5) and (6), and then cools the oil through the four-way conversion valve (16). Oil is supplied to the bearing via the pipes (7) and (8). When operating the valves to the second operation position by performing the oil cooler conversion operation, the four-way conversion valves 15 and 16 are rotated by 90 ° according to the signal of the oil cooler conversion circuit 21. The reverse operation of (23) and (24) to convert the supply of cooling water from the cooling water pipe 11 to the pipe 12 causes the oil cooler 2 to operate, and the oil cooler 1 becomes a backup operation. .

터빈 정지조작후, 터빈이 감속될 때, 즉 본 발명의 제3조작위치로 운전조작할 때의 운전계통을 제3도에 나타낸다. 즉, 터빈정지회로(22)의 신호에 의해 4방향 변환밸브(16)를 90˚회전시키는 한편 밸브(24)를 열어주어 예비하였던 오일 냉각기(2)에도 냉각수를 공급하게 함으로써 윤활유는 오일 배관(5), (6), (7), (13), (9), (10), (8)을 흐르고 오일 냉각기(1), (2)는 오일 계통이 직렬로 접속되어 전체냉각용량은 종래와 동일한 냉각 면적임에도 불구하고 통상 운전시의 2배가 되므로 요구되는 저온과 고점도의 윤활유를 터빈의 베어링에 공급할 수 있다. 그리고 이 경우 2대의 오일 냉각기(1), (2)로의 전체적인 냉각수량은 통상 운전시의 2배가 되지만, 터빈 정지와 동시에 발전기의 수소 냉각기 등은 냉각수를 필요로 하지 않게 되므로 충분한 여유가 있어 운전상의 지장을 초래하지 않는다.3 shows the operating system when the turbine is decelerated after the turbine stop operation, that is, when the turbine is operated to the third operating position of the present invention. That is, the lubricating oil is supplied to the oil cooler 2 by rotating the four-way conversion valve 16 by 90 degrees according to the signal of the turbine stop circuit 22 and opening the valve 24 to supply the coolant 2 to the oil cooler 2 which has been reserved. 5), (6), (7), (13), (9), (10), (8), and the oil coolers (1) and (2) have an oil system connected in series so that the total cooling capacity is In spite of the same cooling area as 2 times, it is doubled in normal operation, so that low temperature and high viscosity lubricating oil can be supplied to the bearing of the turbine. In this case, the total amount of cooling water to the two oil coolers (1) and (2) is twice that of normal operation, but at the same time as the turbine stops, the generator's hydrogen cooler does not need the cooling water, so there is enough room for operation. It does not cause trouble.

그리고 4방향 변환밸브(15), (16)와 냉각수의 변환을 터빈정치회로(22)의 신호에 의해 원격조작화 함으로써 상용 운전중의 오일냉각기의 변환을 용이하게 하고 터빈 정지 신호에 의해 오일 계통을 직렬로 접속시켜 냉각 능력을 배증하는 계통에 자동 변환시킬 수도 있게 하는 것이다.In addition, the four-way valves 15 and 16 and the cooling water are remotely operated by the signals of the turbine political circuit 22 to facilitate the conversion of the oil cooler during commercial operation, and the oil system is changed by the turbine stop signal. It can also be connected in series and automatically converted to a system that doubles its cooling capacity.

이상 설명한 바와 같이 본 발명에 의하면 윤활유 냉각장치의 용량의 증대없이 증기 터빈정지에 있어서의 감속시에도 윤활유 냉각 계통의 요구 급유온도를 만족하는 소정량의 윤활유를 냉각하여 공급할 수 있으므로 신뢰성이 높은 윤활유 냉각장치를 제공할 수 있다.As described above, according to the present invention, highly reliable lubricant cooling can be performed by supplying a predetermined amount of lubricant oil that satisfies the required oil supply temperature of the lubricant cooling system even during deceleration in the steam turbine without increasing the capacity of the lubricant cooling device. A device can be provided.

Claims (1)

상용 및 예비의 오일 냉각기(1), (2)를 구비한 증기터빈의 윤활유 냉각 장치에 있어서, 상기 상용 및 예비의 오일냉각기(1), (2)에 공히 연통되어 윤활유를 공급하는 분기부와, 오일냉각기(1), (2)로부터 냉각된 융활유를 윤활부로 유도하는 오일냉각기(1), (2)에 공히 연통시킨 합류배관의 합류부와 이 합류부에 설치한 각각의 유로 변환 방향밸브(15), (16)와 이들 유로 변환 다방향밸브(15), (16)의 제1의 조작위치에 의하여 상용의 오일 냉각기(1)에만 윤활유를 공급하며, 상기의 변환 다방향밸브의 제2의 조작위치에 의하여 예비의 오일 냉각기(2)에만 윤활유를 공급하며 변환다방향 밸브의 제3조작 위치에 의하여 상용 및 예비의 오일냉각기(1), (2)에 윤활유가 직렬로 통과하여 공급되도록 한 것을 특징으로 하는 증기 터빈의 윤활유 냉각장치.A lubricating oil cooling apparatus for steam turbines having commercial and spare oil coolers (1) and (2), comprising: a branch which communicates with the commercial and spare oil coolers (1) and (2) to supply lubricating oil; And the confluence of the conduit pipes which are in common communication with the oil coolers (1) and (2) for guiding the lubricating oil cooled from the oil coolers (1) and (2) to the lubrication part, and the respective flow path conversion directions provided in the confluence part. The lubricating oil is supplied only to the commercial oil cooler 1 according to the valves 15 and 16 and the first operating positions of these flow path switching multidirectional valves 15 and 16, Lubricating oil is supplied only to the preliminary oil cooler (2) by the second operating position, and lubricating oil passes in series to the commercial and preliminary oil coolers (1) and (2) by the third operating position of the conversion multi-directional valve. Lubricant cooling device for a steam turbine, characterized in that the supply.
KR7904130A 1979-11-24 1979-11-24 Cooling device for lubricating oil of steam turbine KR880000928B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101224364B1 (en) * 2010-12-27 2013-01-21 주식회사 포스코 Cleaning apparatus for lubricating oil coolers

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Publication number Priority date Publication date Assignee Title
FR2781411A1 (en) * 1998-07-23 2000-01-28 Michelin Soc Tech MOLD FOR A VEHICLE PNEUMATIC, AND VULCANIZATION PRESS ADAPTED TO RECEIVE SUCH A MOLD

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101224364B1 (en) * 2010-12-27 2013-01-21 주식회사 포스코 Cleaning apparatus for lubricating oil coolers

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