密封油系統(tǒng)概述

1、ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.1發(fā)電機(jī)密封油系統(tǒng)概述Feb. 2006ALSTOM (Switzerland)Ltd 2001Prel

2、iminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.2氫氣的密封氫氣的密封密封油的作用: 為了保證將一定壓力的氫氣密封于發(fā)電機(jī)機(jī)殼內(nèi), 不從動(dòng)靜間隙間溢出.密封油系統(tǒng)應(yīng)用一切相關(guān)設(shè)備,使供油壓力高于氫壓0.5bar,保證

3、了氫氣的密封.密封油系統(tǒng)的可靠性對(duì)機(jī)組運(yùn)行的可靠性是非常關(guān)鍵的.密封油系統(tǒng)必須保證在機(jī)組靜態(tài)(0 rpm)和帶負(fù)荷運(yùn)行(3000 rpm)時(shí),都保證密封功能.ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express autho

4、rity is strictly forbidden.3單流環(huán)密封油系統(tǒng)單流環(huán)密封油系統(tǒng)ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.4三流環(huán)密封油系

5、統(tǒng)三流環(huán)密封油系統(tǒng)三流環(huán)系統(tǒng)三流環(huán)系統(tǒng) 保證了在氫壓較高時(shí)仍然有很低的漏氫量.實(shí)際的密封元件為套于軸上的密封環(huán)(氫側(cè)和空側(cè)), 與軸頸間的間隙非常小, 并沿軸向由密封瓦座定位和固定.密封環(huán)沿圓周有三個(gè)油槽密封環(huán)沿圓周有三個(gè)油槽. 每個(gè)密封油槽在環(huán)的的側(cè)面沿圓周都鉆有很多油孔, 密封油則在一定的設(shè)計(jì)油壓下, 從油孔注入, 并填充到密封環(huán)和大軸間的間隙中去,起到密封的作用.ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and i

6、n the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.5三流環(huán)密封油系統(tǒng)三流環(huán)密封油系統(tǒng)1. 真空油真空油 2. 含空氣的油含空氣的油 3. 飽含氫氣的油飽含氫氣的油 4.空氣中帶有氫氣空氣中帶有氫氣(微量微量)ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all ri

7、ghts in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.6密封環(huán)在瓦座內(nèi)的情況密封環(huán)在瓦座內(nèi)的情況空側(cè)排油腔室空側(cè)排油腔室氫側(cè)排油腔室氫側(cè)排油腔室空側(cè)油空側(cè)油真空油真空油氫側(cè)油氫側(cè)油氫氣側(cè)氫氣側(cè)空氣側(cè)空氣側(cè)雖然油源一致雖然油源一致,但是經(jīng)過不同管路和設(shè)備但是經(jīng)過不同管路和設(shè)備, 形成空側(cè)、真空側(cè)、氫側(cè)油，注入到三個(gè)油槽中形成空側(cè)、真

8、空側(cè)、氫側(cè)油，注入到三個(gè)油槽中ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.7三流環(huán)密封油系統(tǒng)三流環(huán)密封油系統(tǒng)三個(gè)不同的油路三個(gè)不同的油路：- 空側(cè)油

9、空側(cè)油,含空氣含空氣, 以高于氫壓以高于氫壓0.5bar的壓力從空側(cè)密封環(huán)的中間油槽注入。的壓力從空側(cè)密封環(huán)的中間油槽注入。-真空油真空油, 去處氣體去處氣體, 以高于空側(cè)油大約以高于空側(cè)油大約0.3bar的壓力從空側(cè)密封環(huán)和氫側(cè)密封的壓力從空側(cè)密封環(huán)和氫側(cè)密封環(huán)中間形成的油槽注入。環(huán)中間形成的油槽注入。- 氫側(cè)油氫側(cè)油, 飽含氫氣飽含氫氣, 以和真空油相同的壓力從氫側(cè)密封環(huán)中間的油槽注入。以和真空油相同的壓力從氫側(cè)密封環(huán)中間的油槽注入。ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserv

10、e all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.8密封油壓力密封油壓力空側(cè)油入空側(cè)油入真空油入真空油入氫側(cè)油入氫側(cè)油入真空油從空側(cè)油回油流回真空油從空側(cè)油回油流回, 保證了空氣不進(jìn)入發(fā)電機(jī)內(nèi)部保證了空氣不進(jìn)入發(fā)電機(jī)內(nèi)部, 進(jìn)而保進(jìn)而保證了氫氣的純度證了氫氣的純度.空側(cè)和真空油空側(cè)和真空油,回油在一起回油在一起

11、 氫側(cè)回油氫側(cè)回油 真空油真空油空側(cè)油空側(cè)油氫側(cè)油氫側(cè)油發(fā)電機(jī)外發(fā)電機(jī)外發(fā)電機(jī)內(nèi)發(fā)電機(jī)內(nèi)氫壓氫壓ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.9密封油

12、裝置密封油裝置集成式裝置, 一般位于0m汽機(jī)房發(fā)電機(jī)下, 主油箱(空側(cè)油箱)安裝于裝置側(cè). 裝置與發(fā)電機(jī)靠油管路相連.空側(cè)油箱空側(cè)油箱真空油箱真空油箱ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority

13、 is strictly forbidden.10密封油裝置密封油裝置真空油泵真空油泵空側(cè)油泵空側(cè)油泵氫側(cè)油泵氫側(cè)油泵密封油差壓控制閥密封油差壓控制閥真空油箱真空油箱ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express a

14、uthority is strictly forbidden.11密封油裝置密封油裝置空側(cè)油箱空側(cè)油箱泄油觀察窗泄油觀察窗真空油箱真空油箱冷油器冷油器ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority

15、 is strictly forbidden.12Air-Oil Circuit - 1In the air-oil circuit oil is pumped into the groove on the atmospheric side of the shaft sealing ring. The supply pressure at the ring is 0.5 bar above the hydrogen pressure in the generator.This circuit provides the sealing function, i.e. it serves to co

16、ntain the internal hydrogen pressure at the seal. In view of the importance of maintaining pumping power in this circuit, the main a.c. motor driven pump (1) is backed-up by a second a.c. and a d.c. motor driven pump. The cooler (2) and the filter (3) have both 100% redundancy. The air-oil tank (4)

17、provides the reservoir for the air-oil circuit. Oil is drawn from this tank by the service air-oil pump and pumped to the the seal oil unit and then to the air-side DE and NDE sealing rings via the air-oil cooler and filter.ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We res

18、erve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.13Air-Oil Circuit 2 In order to ensure proper generator sealing, the seal oil pressure must be maintained 0.5 bar above the H2 p

19、ressure at all times and in all types of operation. This task is performed by the differential pressure controller (11), which leads the oil surplus back to the air-oil tank (4).Since the vacuum-oil pressure is set 0.3 bar higher than the air-oil pressure, the air-oil flows into the un-pressurised a

20、ir-side drain chambers and from there back to the air-oil tank.The oil vapour in air-oil tank is expelled by the exhaust blower (fan) (9). At the same time, this fan ensures that the necessary partial vacuum is present in the sealing ring housing.ALSTOM (Switzerland)Ltd 2001Preliminary/for discussio

21、n purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.14差壓控制閥氫壓氫壓 (4 bar)(氫側(cè)排油腔室壓力氫側(cè)排油腔室壓力)空側(cè)油壓空側(cè)油壓 (4,5 bar)型號(hào)型號(hào) 42.25油流向見圖中箭頭所示. 閥芯(3)的位置影響了閥座(2)前后的油壓差.閥位靠彈簧

22、(14)調(diào)整平衡, 壓力取樣脈沖管接至閥位控制室來根據(jù)氫壓及空側(cè)油壓調(diào)整閥門開度,進(jìn)而控制差壓.差壓控制閥對(duì)輕微的差壓變化不起作用.ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is stric

23、tly forbidden.15Vacuum-Oil CircuitThe oil required for degasification is taken from the air-oil line downstream of the filter and taken to the vacuum tank (7) via the level control valve.All entrained gases are separated out of the oil by the vacuum pump (10) on the vacuum tank.The optimum vacuum-oi

24、l pressure can be adjusted by the vacuum pressure regulator (12).The evacuated oil is pumped between the two DE and NDE air-side and gas side sealing rings (middle groove) by the vacuum oil pump (8). The oil pressure in the vacuum oil circuit is set at the pressure regulations valve (12) and so that

25、 vacuum-oil pressure is always 0.3 bar higher than the air-oil pressure.As the H2 pressure is regulated to the same value, the vacuum-oil flows across the pressure drop to the air-oil and returns to the air-oil tankALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all

26、rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.16氫側(cè)油路氫側(cè)油路汽側(cè)和勵(lì)側(cè)的氫側(cè)密封油路各自獨(dú)立.The H2-oil pumps (5) supply the hydrogen-saturated oil to the DE and NDE gas-side sealing rings via the H2-oil

27、 coolers (6). The oil level at the pump inlets is maintained constant by the two oil column controllers (e), which ensures that the H2-oil pressure is always adjusted to the vacuum-oil pressure at the shaft.Due to the pressure drop to the gas side of the generator, the H2-oil flows into the gas-side drain chambers and back to the H2-oil pumps. With the exception of control processes, this circuit can therefore be regarded as a closed oil circuit.ALSTOM (Switzerland)Ltd 2001Preliminary/for discussion purposes only. We reserve all rights in this document and in the informati