发明内容
为了实时准确监测水轮发电机组主轴线曲折程度以及曲折方位,避免因主轴线曲折过大而造成机组振动和摆度增大,进而使设备受力增大,影响设备使用寿命等问题,本发明通过实时采集水轮发电机组摆度波形数据,并对所采摆度波形数据进行综合计算,及时获得主轴线曲折程度是否超过规定值,同时得出主轴线曲折方位,以提前制定处置措施,提高机组运行安全,延长设备使用周期。
本发明通过下列技术方案实现:一种基于摆度波形数据监测立式水轮发电机主轴线曲折的方法,其特征在于包括下列步骤:
1)通过水轮发电机组状态监测系统,从分别安装在上导、下导、水导三个轴承部位的+X方向、+Y方向的共六个位移传感器,获取360°上n个位点的轴承摆度波形值;
2)分别用X上[n]、X下[n]、X水[n]、Y上[n]、Y下[n]、Y水[n]表示上导、下导、水导轴承在+X、+Y方向获取的360°上n个位点的摆度波形值,其中:n=1,2,3…;
3)按如下公式分别计算上导、下导、水导轴承在360°上n个位点的摆度波形平均值:
4)计算n个位点的上导、下导、水导轴承实际摆度波形值,即用步骤1)获取的各位点轴承摆度波形值减去步骤3)计算的各位点轴承摆度波形平均值,计算公式如下:
(i=上导、下导、水导),(n=1,2,3...)
(i=上导、下导、水导),(n=1,2,3...)
其中:Xi[n]、Yi[n]表示上导、下导、水导轴承在n个位点的实际摆度波形值;
5)根据步骤4)计算的上导、下导、水导轴承在360°上n个位点的实际摆度波形值,按照水平投影原理投影在平面X、Y轴上,分别计算主轴线在+X、+Y方向各位点曲折度,计算公式为:(下导轴承摆度波形值一上导轴承摆度波形值)一(水导轴承摆度波形值一上导轴承摆度波形值),即:
Lx[n]=(X下[n]-X上[n])-(X水[n]-X上[n]),(n=1,2,3...)
Ly[n]=(Y下[n]-Y上[n])-(Y水[n]-Y上[n]),(n=1,2,3...)
其中,Lx[n]表示主轴线在+X方向n个位点曲折度,Ly[n]表示主轴线在+Y方向n个位点曲折度;
6)根据步骤5)计算的主轴线在+X、+Y方向的n个位点曲折度Lx[n]、Ly[n],按矢量方法合成一个曲折度,对应计算公式如下:
其中,L[n]表示合成的主轴线曲折度;
7)根据步骤5)计算的+X、+Y方向各位点曲折度Lx[n]、Ly[n],计算步骤6)合成的主轴线各位点曲折度对应的实际相位值,计算公式如下:
δ[i]=β[i]+α[i],(i=0,1,2,...)
式中,β[i]为合成点相位,单位为:弧度;α[i]初始相位,单位为:弧度;δ[i]为实际相位值,单位为:弧度;
8)根据步骤6)、7)计算的主轴线曲折度L[n]和对应的实际相位δ[i],计算各曲折度对应于+X、+Y轴上的分量,计算公式如下:
X[n]=L[n]×cos(δ[i]),(i,n=1,2,3...)
Y[n]=L[n]×sin(δ[i]),(i,n=1,2,3...)
其中X[n]、Y[n]表示合成的主轴线曲折度L[n]在+X、+Y轴上的分量;
9)根据步骤8)计算的+X、+Y轴上的分量X[n]、Y[n],分别计算主轴线相对于+X、+Y轴的曲折度平均值,计算公式如下:
10)根据步骤9)计算的主轴线在+X、+Y轴曲折度平均值,按矢量方式合成总的主轴线曲折度及对应的中心,计算公式如下:
其中:L表示主轴线曲折度,β表示主轴线曲折的方位;
11)根据步骤1)实时采集的轴承摆度波形数据,与按步骤2)-10)实时计算水轮发电机主轴线的曲折度及曲折方位,结合国标GB8564进行比较:多段轴结构的机组,在盘车时应检查各段轴线的曲折情况,偏差小于0.04mm/m;大于0.04mm/m的,表明主轴线出现曲折,需要提前制定处置措施,按计划进行检修处理,低于0.04mm/m的,表明主轴线曲折度在正常范围。
本发明具有下列优点和效果:盘车测量机组主轴线是一项复杂而系统的工作,对检修人员技术水平要求较高,而且轴线测量都在机组检修期较长的期间开展。本发明通过实时采集上导、下导、水导轴承摆度波形数据,计算上导、下导、水导轴承摆度合成的轴线倾斜度,创造性地提出根据各轴线倾斜度计算水轮发电机主轴线的曲折度及曲折方位。本发明具有实时性和准确性,可通过计算机实时计算机组主轴线状况进行监视,避免因主轴线曲折过大造成机组的振动和摆度增大,以及设备受力增强,影响设备使用寿命,及时发现主轴线曲折较大现象,并提前制定处置措施,根据计算的主轴线曲折度及曲折方位,指导机组主轴线调整工作,对提高机组运行的稳定性,延长设备使用寿命,指导水轮发电机组运行状态分析及主轴线调整,具有很好的实际意义及推广价值。
具体实施方式
下面通过实施例进一步举例说明
实施例1
本实施例1采集某水电厂1号机组某一时刻的轴承摆度波形值,通过该轴承摆度波形值监测水轮发电机主轴线是否存在曲折:
1)通过现有的水轮发电机状态监测系统,从分别安装在上导、下导、水导轴承三个部位的+X方向、+Y方向的共计六个电涡流位移传感器,获取对应轴承摆度波形值,即:本实施例的轴承摆度波形值在监测系统中,360°下有256个位点,因此上导、下导、水导轴承分别在360°下有256个位点依次经过安装在+X、+Y方向对应的电涡流位移传感器,从而在+X、+Y方向分别获取256个轴承摆度波形值序列,具体如表1-6;
表1:上导轴承在+X方向获取的256个摆度波形值序列(单位:μm):
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
116.5 |
51.6 |
-20.6 |
-71.5 |
-94.8 |
-99.9 |
-92.0 |
-63.6 |
-7.2 |
66.4 |
125.4 |
137.7 |
114.2 |
48.2 |
-23.5 |
-73.1 |
-95.4 |
-99.9 |
-91.2 |
-61.6 |
-4.0 |
69.7 |
127.1 |
136.9 |
111.9 |
44.7 |
-26.4 |
-74.6 |
-95.9 |
-99.8 |
-90.4 |
-59.6 |
-0.9 |
72.9 |
128.8 |
136.0 |
109.4 |
41.3 |
-29.2 |
-76.1 |
-96.4 |
-99.7 |
-89.6 |
-57.6 |
2.4 |
76.1 |
130.3 |
134.9 |
106.9 |
37.9 |
-32.0 |
-77.6 |
-96.8 |
-99.5 |
-88.7 |
-55.4 |
5.6 |
79.3 |
131.8 |
133.8 |
104.3 |
34.5 |
-34.7 |
-79.0 |
-97.2 |
-99.4 |
-87.7 |
-53.2 |
8.9 |
82.4 |
133.1 |
132.5 |
101.6 |
31.1 |
-37.3 |
-80.3 |
-97.6 |
-99.2 |
-86.7 |
-51.0 |
12.2 |
85.5 |
134.3 |
131.2 |
98.9 |
27.7 |
-39.9 |
-81.6 |
-97.9 |
-99.0 |
-85.7 |
-48.7 |
15.6 |
88.5 |
135.4 |
129.7 |
96.1 |
24.3 |
-42.4 |
-82.8 |
-98.3 |
-98.7 |
-84.6 |
-46.3 |
18.9 |
91.5 |
136.4 |
128.1 |
93.2 |
20.9 |
-44.9 |
-84.0 |
-98.6 |
-98.4 |
-83.5 |
-43.9 |
22.3 |
94.4 |
137.2 |
126.4 |
90.3 |
17.5 |
-47.3 |
-85.1 |
-98.8 |
-98.1 |
-82.3 |
-41.4 |
25.7 |
97.3 |
138.0 |
124.6 |
87.3 |
14.1 |
-49.6 |
-86.1 |
-99.1 |
-97.8 |
-81.0 |
-38.8 |
29.1 |
100.0 |
138.6 |
122.7 |
84.2 |
10.8 |
-51.9 |
-87.2 |
-99.3 |
-97.4 |
-79.8 |
-36.2 |
32.5 |
102.8 |
139.1 |
120.7 |
81.1 |
7.5 |
-54.2 |
-88.1 |
-99.4 |
-97.1 |
-78.4 |
-33.5 |
35.9 |
105.4 |
139.5 |
118.7 |
78.0 |
4.2 |
-56.3 |
-89.0 |
-99.6 |
-96.6 |
-77.0 |
-30.8 |
39.3 |
108.0 |
139.8 |
|
74.8 |
1.0 |
-58.4 |
-89.9 |
-99.7 |
-96.2 |
-75.5 |
-28.0 |
42.8 |
110.4 |
140.0 |
|
71.5 |
-2.2 |
-60.5 |
-90.7 |
-99.8 |
-95.7 |
-74.0 |
-25.2 |
46.2 |
112.9 |
140.0 |
|
68.3 |
-5.4 |
-62.5 |
-91.5 |
-99.9 |
-95.2 |
-72.4 |
-22.3 |
49.6 |
115.2 |
139.9 |
|
65.0 |
-8.5 |
-64.4 |
-92.3 |
-100.0 |
-94.6 |
-70.8 |
-19.4 |
53.0 |
117.4 |
139.7 |
|
61.7 |
-11.6 |
-66.3 |
-93.0 |
-100.0 |
-94.0 |
-69.1 |
-16.4 |
56.4 |
119.5 |
139.4 |
|
58.3 |
-14.7 |
-68.1 |
-93.6 |
-100.0 |
-93.4 |
-67.3 |
-13.4 |
59.7 |
121.6 |
138.9 |
|
54.9 |
-17.7 |
-69.8 |
-94.3 |
-100.0 |
-92.7 |
-65.5 |
-10.3 |
63.1 |
123.5 |
138.4 |
|
表2:上导轴承在+Y方向获取的256个摆度波形值序列(单位:μm):
表3:下导轴承在+X方向获取的256个摆度波形值序列(单位:μm):
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
151.7 |
71.9 |
-20.8 |
-92.2 |
-130.2 |
-139.9 |
-125.1 |
-80.5 |
-3.1 |
90.4 |
162.4 |
177.2 |
148.9 |
67.7 |
-24.7 |
-94.7 |
-131.2 |
-139.8 |
-123.8 |
-77.7 |
1.1 |
94.4 |
164.5 |
176.3 |
146.1 |
63.4 |
-28.6 |
-97.0 |
-132.1 |
-139.6 |
-122.4 |
-74.8 |
5.2 |
98.4 |
166.5 |
175.2 |
143.1 |
59.1 |
-32.3 |
-99.3 |
-133.0 |
-139.3 |
-121.0 |
-71.8 |
9.4 |
102.4 |
168.4 |
173.9 |
140.0 |
54.8 |
-36.1 |
-101.6 |
-133.8 |
-139.1 |
-119.5 |
-68.7 |
13.6 |
106.3 |
170.1 |
172.5 |
136.9 |
50.5 |
-39.8 |
-103.7 |
-134.6 |
-138.7 |
-117.9 |
-65.6 |
17.9 |
110.1 |
171.7 |
171.0 |
133.6 |
46.2 |
-43.4 |
-105.8 |
-135.3 |
-138.4 |
-116.2 |
-62.4 |
22.1 |
113.9 |
173.1 |
169.4 |
130.3 |
41.9 |
-46.9 |
-107.9 |
-136.0 |
-137.9 |
-114.5 |
-59.1 |
26.4 |
117.6 |
174.5 |
167.6 |
126.9 |
37.5 |
-50.4 |
-109.8 |
-136.6 |
-137.5 |
-112.8 |
-55.8 |
30.7 |
121.3 |
175.6 |
165.7 |
123.3 |
33.2 |
-53.9 |
-111.7 |
-137.2 |
-136.9 |
-110.9 |
-52.4 |
35.0 |
124.8 |
176.7 |
163.7 |
119.8 |
28.9 |
-57.2 |
-113.5 |
-137.7 |
-136.4 |
-109.0 |
-49.0 |
39.3 |
128.3 |
177.6 |
161.5 |
116.1 |
24.6 |
-60.5 |
-115.3 |
-138.1 |
-135.7 |
-107.0 |
-45.4 |
43.7 |
131.7 |
178.3 |
159.2 |
112.3 |
20.3 |
-63.7 |
-116.9 |
-138.5 |
-135.0 |
-105.0 |
-41.9 |
48.0 |
135.0 |
179.0 |
156.8 |
108.5 |
16.1 |
-66.9 |
-118.6 |
-138.9 |
-134.3 |
-102.8 |
-38.2 |
52.3 |
138.2 |
179.4 |
154.3 |
104.7 |
11.8 |
-70.0 |
-120.1 |
-139.2 |
-133.5 |
-100.7 |
-34.5 |
56.6 |
141.3 |
179.8 |
|
100.7 |
7.6 |
-73.0 |
-121.6 |
-139.4 |
-132.7 |
-98.4 |
-30.8 |
60.9 |
144.4 |
180.0 |
|
96.8 |
3.5 |
-76.0 |
-123.0 |
-139.7 |
-131.8 |
-96.0 |
-26.9 |
65.2 |
147.3 |
180.0 |
|
92.7 |
-0.7 |
-78.9 |
-124.4 |
-139.8 |
-130.8 |
-93.6 |
-23.1 |
69.5 |
150.1 |
179.9 |
|
88.6 |
-4.8 |
-81.7 |
-125.6 |
-139.9 |
-129.8 |
-91.2 |
-19.2 |
73.7 |
152.8 |
179.6 |
|
84.5 |
-8.9 |
-84.4 |
-126.9 |
-140.0 |
-128.7 |
-88.6 |
-15.2 |
77.9 |
155.4 |
179.3 |
|
80.4 |
-12.9 |
-87.1 |
-128.0 |
-140.0 |
-127.6 |
-86.0 |
-11.2 |
82.1 |
157.8 |
178.7 |
|
76.2 |
-16.9 |
-89.7 |
-129.2 |
-140.0 |
-126.4 |
-83.3 |
-7.2 |
86.3 |
160.2 |
178.0 |
|
表4:下导轴承在+Y方向获取的256个摆度波形值序列(单位:μm):
表5:水导轴承在+X方向获取的256个摆度波形值序列(单位:μm):
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
93.4 |
46.2 |
-10.5 |
-56.5 |
-82.8 |
-89.9 |
-79.1 |
-48.7 |
0.5 |
57.2 |
99.7 |
108.4 |
91.8 |
43.6 |
-13.0 |
-58.1 |
-83.5 |
-89.8 |
-78.2 |
-46.8 |
3.1 |
59.6 |
101.0 |
107.8 |
90.1 |
41.0 |
-15.4 |
-59.7 |
-84.2 |
-89.7 |
-77.2 |
-44.9 |
5.6 |
62.0 |
102.1 |
107.2 |
88.4 |
38.5 |
-17.7 |
-61.3 |
-84.8 |
-89.5 |
-76.2 |
-43.0 |
8.2 |
64.3 |
103.2 |
106.5 |
86.6 |
35.9 |
-20.1 |
-62.8 |
-85.4 |
-89.3 |
-75.1 |
-41.0 |
10.8 |
66.7 |
104.2 |
105.6 |
84.7 |
33.3 |
-22.4 |
-64.3 |
-86.0 |
-89.1 |
-74.0 |
-39.0 |
13.4 |
68.9 |
105.1 |
104.8 |
82.8 |
30.6 |
-24.7 |
-65.7 |
-86.5 |
-88.8 |
-72.9 |
-36.9 |
16.0 |
71.2 |
106.0 |
103.8 |
80.8 |
28.0 |
-27.0 |
-67.1 |
-87.0 |
-88.5 |
-71.7 |
-34.8 |
18.6 |
73.4 |
106.8 |
102.8 |
78.8 |
25.4 |
-29.2 |
-68.4 |
-87.5 |
-88.1 |
-70.4 |
-32.7 |
21.3 |
75.5 |
107.5 |
101.6 |
76.7 |
22.8 |
-31.4 |
-69.7 |
-87.9 |
-87.7 |
-69.2 |
-30.5 |
23.9 |
77.6 |
108.1 |
100.5 |
74.6 |
20.2 |
-33.6 |
-71.0 |
-88.3 |
-87.3 |
-67.9 |
-28.3 |
26.5 |
79.7 |
108.6 |
99.2 |
72.5 |
17.5 |
-35.7 |
-72.2 |
-88.6 |
-86.8 |
-66.5 |
-26.0 |
29.1 |
81.7 |
109.0 |
97.8 |
70.2 |
14.9 |
-37.8 |
-73.4 |
-88.9 |
-86.3 |
-65.1 |
-23.8 |
31.7 |
83.6 |
109.4 |
96.4 |
68.0 |
12.3 |
-39.8 |
-74.5 |
-89.2 |
-85.8 |
-63.6 |
-21.5 |
34.4 |
85.5 |
109.7 |
95.0 |
65.7 |
9.7 |
-41.8 |
-75.6 |
-89.4 |
-85.2 |
-62.2 |
-19.1 |
37.0 |
87.4 |
109.9 |
|
63.4 |
7.1 |
-43.8 |
-76.6 |
-89.6 |
-84.6 |
-60.6 |
-16.7 |
39.5 |
89.1 |
110.0 |
|
61.0 |
4.6 |
-45.7 |
-77.6 |
-89.7 |
-83.9 |
-59.0 |
-14.4 |
42.1 |
90.8 |
110.0 |
|
58.6 |
2.0 |
-47.6 |
-78.6 |
-89.9 |
-83.2 |
-57.4 |
-11.9 |
44.7 |
92.5 |
109.9 |
|
56.2 |
-0.5 |
-49.5 |
-79.5 |
-89.9 |
-82.5 |
-55.8 |
-9.5 |
47.2 |
94.1 |
109.8 |
|
53.7 |
-3.1 |
-51.3 |
-80.4 |
-90.0 |
-81.7 |
-54.1 |
-7.0 |
49.8 |
95.6 |
109.6 |
|
51.2 |
-5.6 |
-53.1 |
-81.2 |
-90.0 |
-80.9 |
-52.3 |
-4.5 |
52.3 |
97.0 |
109.3 |
|
48.7 |
-8.1 |
-54.8 |
-82.0 |
-90.0 |
-80.0 |
-50.5 |
-2.0 |
54.7 |
98.4 |
108.9 |
|
表6:水导轴承在+Y方向获取的256个摆度波形值序列(单位:μm):
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
-51.9 |
-82.2 |
-92.0 |
-81.8 |
-51.2 |
-2.6 |
53.0 |
95.7 |
107.3 |
82.3 |
32.1 |
-22.8 |
-53.8 |
-83.1 |
-92.0 |
-80.9 |
-49.4 |
-0.1 |
55.4 |
97.0 |
106.9 |
80.4 |
29.6 |
-25.1 |
-55.5 |
-83.9 |
-91.9 |
-79.9 |
-47.5 |
2.5 |
57.7 |
98.3 |
106.5 |
78.5 |
27.0 |
-27.3 |
-57.3 |
-84.7 |
-91.8 |
-78.9 |
-45.5 |
5.0 |
60.0 |
99.5 |
105.9 |
76.5 |
24.4 |
-29.6 |
-58.9 |
-85.5 |
-91.6 |
-77.8 |
-43.5 |
7.5 |
62.3 |
100.6 |
105.3 |
74.5 |
21.9 |
-31.8 |
-60.6 |
-86.2 |
-91.4 |
-76.7 |
-41.5 |
10.1 |
64.6 |
101.6 |
104.7 |
72.4 |
19.3 |
-34.0 |
-62.2 |
-86.9 |
-91.2 |
-75.5 |
-39.5 |
12.6 |
66.8 |
102.5 |
103.9 |
70.3 |
16.7 |
-36.1 |
-63.8 |
-87.5 |
-90.9 |
-74.3 |
-37.4 |
15.2 |
69.0 |
103.4 |
103.1 |
68.1 |
14.2 |
-38.2 |
-65.3 |
-88.1 |
-90.6 |
-73.1 |
-35.3 |
17.8 |
71.1 |
104.2 |
102.2 |
65.9 |
11.6 |
-40.3 |
-66.8 |
-88.6 |
-90.3 |
-71.8 |
-33.1 |
20.3 |
73.2 |
104.9 |
101.2 |
63.7 |
9.1 |
-42.3 |
-68.2 |
-89.1 |
-89.9 |
-70.4 |
-30.9 |
22.9 |
75.3 |
105.6 |
100.1 |
61.4 |
6.5 |
-44.3 |
-69.6 |
-89.6 |
-89.4 |
-69.1 |
-28.7 |
25.5 |
77.3 |
106.2 |
99.0 |
59.1 |
4.0 |
-46.3 |
-71.0 |
-90.0 |
-88.9 |
-67.7 |
-26.5 |
28.0 |
79.2 |
106.7 |
97.8 |
56.8 |
1.5 |
-48.2 |
-72.3 |
-90.4 |
-88.4 |
-66.2 |
-24.2 |
30.6 |
81.2 |
107.1 |
96.5 |
54.4 |
-1.1 |
-50.1 |
-73.6 |
-90.8 |
-87.9 |
-64.7 |
-21.9 |
33.1 |
83.0 |
107.4 |
95.2 |
52.0 |
-3.5 |
|
-74.8 |
-91.1 |
-87.2 |
-63.2 |
-19.5 |
35.7 |
84.8 |
107.7 |
93.8 |
49.6 |
-6.0 |
|
-76.0 |
-91.3 |
-86.6 |
-61.6 |
-17.2 |
38.2 |
86.5 |
107.9 |
92.3 |
47.2 |
-8.5 |
|
-77.1 |
-91.5 |
-85.9 |
-60.0 |
-14.8 |
40.7 |
88.2 |
108.0 |
90.8 |
44.7 |
-10.9 |
|
-78.2 |
-91.7 |
-85.2 |
-58.3 |
-12.4 |
43.2 |
89.9 |
108.0 |
89.2 |
42.2 |
-13.3 |
|
-79.3 |
-91.8 |
-84.4 |
-56.6 |
-10.0 |
45.7 |
91.4 |
107.9 |
87.6 |
39.7 |
-15.7 |
|
-80.3 |
-91.9 |
-83.6 |
-54.8 |
-7.5 |
48.1 |
92.9 |
107.8 |
85.9 |
37.2 |
-18.1 |
|
-81.3 |
-92.0 |
-82.7 |
-53.0 |
-5.0 |
50.6 |
94.4 |
107.6 |
84.1 |
34.6 |
-20.5 |
|
2)分别用X上[n]、X下[n]、X水[n]、Y上[n]、Y下[n]、Y水[n]表示上导、下导、水导轴承在+X、+Y方向获取的360°上256个位点的摆度波形值序列;
3)按如下公式分别计算上导、下导、水导轴承在360°上256个位点的摆度波形平均值:
(i=上导、下导、水导),(n=1,2,3…256);
(i=上导、下导、水导),(n=1,2,3…256);
计算结果:上导、下导、水导轴承在+X、+Y方向的摆度波形平均值均为0,符合旋转机械的特性;
4)计算上导、下导、水导轴承在256个位点的实际摆度波形值序列,即用步骤1)获取的各位点轴承摆度波形值减去步骤3)计算的轴承摆度波形平均值,计算公式如下:
(i=上导、下导、水导),(n=1,2,3...256)
(i=上导、下导、水导),(n=1,2,3...256)
其中Xi[n]、Yi[n]表示上导、下导、水导轴承在360°上256个位点的实际摆度波形值序列;
5)根据步骤4)计算的上导、下导、水导轴承在360°上256个位点的实际摆度波形值序列,按照水平投影的原理投影在平面X、Y轴上,分别计算主轴线在+X、+Y方向各点位曲折度序列,计算公式为:(下导轴承摆度波形值一上导轴承摆度波形值)一(水导轴承摆度波形值一上导轴承摆度波形值),即:
Lx[n]=(X下[n]-X上[n])-(X水[n]-X上[n]),(n=1,2,3...256)
Ly[n]=(Y下[n]-Y上[n])-(Y水[n]-Y上[n]),(n=1,2,3...256)
其中,Lx[n]表示主轴线在+X方向各点位曲折度序列,Ly[n]表示主轴线在+Y方向各点位曲折度序列,得到+X、+Y曲折度序列如表7-8:
表7:主轴线在+X方向的曲折度序列(单位:μm):
表8:主轴线在+Y方向的曲折度序列(单位:μm)
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
-32.4 |
-48.3 |
-53.0 |
-48.1 |
-32.0 |
-3.7 |
31.0 |
58.9 |
66.5 |
50.0 |
17.7 |
-15.8 |
-33.3 |
-48.7 |
-53.0 |
-47.6 |
-30.9 |
-2.2 |
32.5 |
59.7 |
66.3 |
48.8 |
16.1 |
-17.1 |
-34.3 |
-49.1 |
-53.0 |
-47.1 |
-29.9 |
-0.7 |
34.0 |
60.5 |
66.0 |
47.5 |
14.5 |
-18.4 |
-35.3 |
-49.5 |
-52.9 |
-46.6 |
-28.8 |
0.9 |
35.5 |
61.3 |
65.6 |
46.2 |
12.9 |
-19.7 |
-36.2 |
-49.9 |
-52.8 |
-46.1 |
-27.7 |
2.4 |
37.0 |
62.0 |
65.2 |
44.9 |
11.3 |
-21.0 |
-37.1 |
-50.2 |
-52.7 |
-45.5 |
-26.6 |
4.0 |
38.5 |
62.7 |
64.8 |
43.5 |
9.7 |
-22.3 |
-37.9 |
-50.5 |
-52.6 |
-44.9 |
-25.4 |
5.6 |
39.9 |
63.4 |
64.3 |
42.2 |
8.1 |
-23.5 |
-38.8 |
-50.9 |
-52.5 |
-44.3 |
-24.2 |
7.1 |
41.3 |
63.9 |
63.7 |
40.7 |
6.5 |
-24.7 |
-39.6 |
-51.1 |
-52.3 |
-43.6 |
-23.0 |
8.7 |
42.7 |
64.5 |
63.1 |
39.3 |
4.9 |
-25.9 |
-40.4 |
-51.4 |
-52.2 |
-43.0 |
-21.8 |
10.3 |
44.1 |
65.0 |
62.5 |
37.9 |
3.4 |
-27.0 |
-41.1 |
-51.6 |
-52.0 |
-42.3 |
-20.5 |
11.9 |
45.4 |
65.4 |
61.8 |
36.4 |
1.8 |
-28.1 |
-41.9 |
-51.9 |
-51.8 |
-41.6 |
-19.2 |
13.5 |
46.7 |
65.8 |
61.0 |
34.9 |
0.2 |
-29.2 |
-42.6 |
-52.1 |
-51.5 |
-40.8 |
-17.9 |
15.1 |
48.0 |
66.1 |
60.2 |
33.4 |
-1.3 |
-30.3 |
-43.2 |
-52.2 |
-51.3 |
-40.1 |
-16.6 |
16.7 |
49.2 |
66.4 |
59.4 |
31.9 |
-2.8 |
-31.4 |
-43.9 |
-52.4 |
-51.0 |
-39.3 |
-15.2 |
18.3 |
50.5 |
66.6 |
58.5 |
30.3 |
-4.3 |
|
-44.5 |
-52.6 |
-50.7 |
-38.5 |
-13.9 |
19.9 |
51.6 |
66.8 |
57.6 |
28.8 |
-5.8 |
|
-45.1 |
-52.7 |
-50.4 |
-37.6 |
-12.5 |
21.5 |
52.8 |
66.9 |
56.6 |
27.2 |
-7.3 |
|
-45.7 |
-52.8 |
-50.1 |
-36.7 |
-11.1 |
23.1 |
53.9 |
67.0 |
55.6 |
25.7 |
-8.8 |
|
-46.3 |
-52.9 |
-49.7 |
-35.8 |
-9.6 |
24.7 |
55.0 |
67.0 |
54.6 |
24.1 |
-10.2 |
|
-46.8 |
-52.9 |
-49.3 |
-34.9 |
-8.2 |
26.3 |
56.0 |
67.0 |
53.5 |
22.5 |
-11.6 |
|
-47.3 |
-53.0 |
-48.9 |
-34.0 |
-6.7 |
27.9 |
57.0 |
66.9 |
52.3 |
20.9 |
-13.0 |
|
-47.8 |
-53.0 |
-48.5 |
-33.0 |
-5.2 |
29.4 |
57.9 |
66.7 |
51.2 |
19.3 |
-14.4 |
|
6)根据步骤5)计算的主轴线在+X、+Y两个方向的曲折度序列Lx[n]、Ly[n],按矢量方法合成一个曲折度序列,对应计算公式如下:
其中,L[n]表示合成的主轴线各点位曲折度序列,如表9(单位:μm):
表9:合成的主轴线曲折度序列
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
66.6 |
54.7 |
54.0 |
59.9 |
57.2 |
50.1 |
55.4 |
66.9 |
66.6 |
60.0 |
65.1 |
70.6 |
66.1 |
54.3 |
54.3 |
60.0 |
56.8 |
50.0 |
56.0 |
67.2 |
66.3 |
59.9 |
65.6 |
70.6 |
65.6 |
54.0 |
54.6 |
60.1 |
56.5 |
49.9 |
56.6 |
67.5 |
66.0 |
59.9 |
66.0 |
70.4 |
65.1 |
53.6 |
54.9 |
60.2 |
56.1 |
49.8 |
57.1 |
67.7 |
65.6 |
59.9 |
66.4 |
70.3 |
64.5 |
53.3 |
55.2 |
60.2 |
55.8 |
49.8 |
57.7 |
68.0 |
65.3 |
59.9 |
66.8 |
70.1 |
64.0 |
53.1 |
55.5 |
60.2 |
55.4 |
49.8 |
58.3 |
68.1 |
64.9 |
59.9 |
67.2 |
69.9 |
63.4 |
52.9 |
55.8 |
60.2 |
55.0 |
49.9 |
58.9 |
68.3 |
64.6 |
60.0 |
67.6 |
69.7 |
62.8 |
52.7 |
56.2 |
60.2 |
54.6 |
50.0 |
59.5 |
68.4 |
64.2 |
60.2 |
68.0 |
69.4 |
62.2 |
52.6 |
56.5 |
60.2 |
54.2 |
50.1 |
60.1 |
68.5 |
63.8 |
60.3 |
68.4 |
69.1 |
61.7 |
52.4 |
56.8 |
60.1 |
53.9 |
50.3 |
60.7 |
68.6 |
63.4 |
60.5 |
68.7 |
68.7 |
61.1 |
52.4 |
57.1 |
60.0 |
53.5 |
50.5 |
61.3 |
68.6 |
63.1 |
60.7 |
69.0 |
68.4 |
60.5 |
52.3 |
57.4 |
59.9 |
53.1 |
50.7 |
61.8 |
68.6 |
62.7 |
61.0 |
69.3 |
68.0 |
59.9 |
52.3 |
57.7 |
59.7 |
52.8 |
51.0 |
62.4 |
68.5 |
62.4 |
61.3 |
69.6 |
67.5 |
59.3 |
52.4 |
58.0 |
59.6 |
52.4 |
51.3 |
62.9 |
68.5 |
62.0 |
61.6 |
69.8 |
67.1 |
58.7 |
52.5 |
58.3 |
59.4 |
52.1 |
51.7 |
63.5 |
68.4 |
61.7 |
61.9 |
70.0 |
|
58.1 |
52.6 |
58.5 |
59.2 |
51.8 |
52.1 |
64.0 |
68.2 |
61.4 |
62.3 |
70.2 |
|
57.6 |
52.7 |
58.8 |
58.9 |
51.4 |
52.5 |
64.5 |
68.1 |
61.1 |
62.7 |
70.4 |
|
57.1 |
52.8 |
59.0 |
58.7 |
51.2 |
52.9 |
64.9 |
67.9 |
60.9 |
63.0 |
70.5 |
|
56.5 |
53.0 |
59.2 |
58.4 |
50.9 |
53.4 |
65.4 |
67.7 |
60.6 |
63.4 |
70.6 |
|
56.0 |
53.2 |
59.4 |
58.1 |
50.7 |
53.9 |
65.8 |
67.5 |
60.4 |
63.9 |
70.7 |
|
55.6 |
53.5 |
59.6 |
57.8 |
50.4 |
54.4 |
66.2 |
67.2 |
60.3 |
64.3 |
70.7 |
|
55.1 |
53.7 |
59.8 |
57.5 |
50.3 |
54.9 |
66.6 |
66.9 |
60.1 |
64.7 |
70.7 |
|
7)根据步骤5)计算的+X、+Y方向的曲折度序列Lx[n]、Ly[n],计算步骤6)合成的主轴线各点位曲折度序列对应的实际相位值,计算公式如下:
(i=0,1,2...255)(n=1,2,3...255)
δ[i]=β[i]+a[i],(i=0,1,2,...255)
式中,β[i]为合成点相位,单位为:弧度;α[i]初始相位,单位为:弧度;δ[i]为实际相位值,单位为:弧度;
对应的实际相位值序列如表10:
表10:实际相位值序列如下(单位:弧度):
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
-0.51 |
-0.54 |
-0.68 |
-0.59 |
-0.39 |
-0.37 |
5.79 |
5.85 |
5.94 |
5.84 |
5.67 |
5.71 |
-0.50 |
-0.55 |
-0.68 |
-0.58 |
-0.38 |
-0.37 |
5.79 |
5.85 |
5.95 |
5.83 |
5.67 |
5.72 |
-0.50 |
-0.55 |
-0.69 |
-0.57 |
-0.38 |
-0.38 |
5.79 |
5.86 |
5.95 |
5.82 |
5.67 |
5.72 |
-0.50 |
-0.56 |
-0.69 |
-0.56 |
-0.37 |
5.90 |
5.78 |
5.86 |
5.95 |
5.82 |
5.67 |
5.73 |
-0.50 |
-0.57 |
-0.69 |
-0.55 |
-0.36 |
5.89 |
5.78 |
5.87 |
5.95 |
5.81 |
5.67 |
5.73 |
-0.50 |
-0.58 |
-0.69 |
-0.54 |
-0.36 |
5.88 |
5.78 |
5.87 |
5.94 |
5.80 |
5.67 |
5.74 |
-0.49 |
-0.59 |
-0.68 |
-0.53 |
-0.35 |
5.88 |
5.79 |
5.88 |
5.94 |
5.79 |
5.67 |
5.74 |
-0.49 |
-0.59 |
-0.68 |
-0.52 |
-0.35 |
5.87 |
5.79 |
5.89 |
5.94 |
5.78 |
5.67 |
5.75 |
-0.49 |
-0.60 |
-0.68 |
-0.51 |
-0.35 |
5.86 |
5.79 |
5.89 |
5.94 |
5.77 |
5.67 |
5.75 |
-0.49 |
-0.61 |
-0.68 |
-0.50 |
-0.35 |
5.86 |
5.79 |
5.90 |
5.93 |
5.76 |
5.67 |
5.76 |
-0.49 |
-0.62 |
-0.67 |
-0.49 |
-0.34 |
5.85 |
5.79 |
5.90 |
5.93 |
5.75 |
5.67 |
5.76 |
-0.49 |
-0.63 |
-0.67 |
-0.48 |
-0.34 |
5.84 |
5.80 |
5.91 |
5.93 |
5.74 |
5.67 |
5.77 |
-0.50 |
-0.63 |
-0.66 |
-0.47 |
-0.34 |
5.84 |
5.80 |
5.91 |
5.92 |
5.73 |
5.68 |
5.77 |
-0.50 |
-0.64 |
-0.66 |
-0.46 |
-0.34 |
5.83 |
5.80 |
5.92 |
5.92 |
5.72 |
5.68 |
5.77 |
-0.50 |
-0.65 |
-0.65 |
-0.46 |
-0.34 |
5.82 |
5.81 |
5.92 |
5.91 |
5.72 |
5.68 |
|
-0.50 |
-0.65 |
-0.65 |
-0.45 |
-0.34 |
5.82 |
5.81 |
5.93 |
5.90 |
5.71 |
5.68 |
|
-0.51 |
-0.66 |
-0.64 |
-0.44 |
-0.34 |
5.81 |
5.81 |
5.93 |
5.90 |
5.70 |
5.69 |
|
-0.51 |
-0.66 |
-0.63 |
-0.43 |
-0.35 |
5.81 |
5.82 |
5.93 |
5.89 |
5.70 |
5.69 |
|
-0.52 |
-0.67 |
-0.62 |
-0.42 |
-0.35 |
5.80 |
5.82 |
5.94 |
5.88 |
5.69 |
5.70 |
|
-0.52 |
-0.67 |
-0.62 |
-0.41 |
-0.35 |
5.80 |
5.83 |
5.94 |
5.87 |
5.69 |
5.70 |
|
-0.53 |
-0.68 |
-0.61 |
-0.40 |
-0.36 |
5.79 |
5.83 |
5.94 |
5.86 |
5.68 |
5.71 |
|
-0.53 |
-0.68 |
-0.60 |
-0.40 |
-0.36 |
5.79 |
5.84 |
5.94 |
5.85 |
5.68 |
5.71 |
|
8)根据步骤6)、7)计算的主轴线曲折度序列L[n]和对应的实际相位值序列δ[i],计算各位点曲折度对应在+X、+Y轴上的分量,计算公式如下:
X[n]=L[n]×cos(δ[i]),(i,n=1,2,3...256)
Y[n]=L[n]×sin(δ[i]),(i,n=1,2,3...256)δ
其中X[n]、Y[n]分别表示主轴线曲折度序列L[n]和对应的实际相位值序列δ[i]在+X、+Y轴上的分量;
计算得到的分量序列如表11-12:
表11:主轴线曲折度在X轴上的分量序列(单位:μm):
1-22 |
23-44 |
45-66 |
67-88 |
89-110 |
111-132 |
133-154 |
155-176 |
177-198 |
199-220 |
221-242 |
243-256 |
58.2 |
46.9 |
41.9 |
49.8 |
52.9 |
46.8 |
48.8 |
60.6 |
62.8 |
54.3 |
53.5 |
59.5 |
57.9 |
46.4 |
42.0 |
50.2 |
52.8 |
46.5 |
49.2 |
61.0 |
62.6 |
54.0 |
53.7 |
59.6 |
57.5 |
45.9 |
42.2 |
50.5 |
52.6 |
46.4 |
49.7 |
61.5 |
62.3 |
53.7 |
54.0 |
59.7 |
57.2 |
45.4 |
42.4 |
50.9 |
52.3 |
46.2 |
50.2 |
61.8 |
62.0 |
53.4 |
54.3 |
59.8 |
56.7 |
44.9 |
42.7 |
51.2 |
52.1 |
46.0 |
50.7 |
62.2 |
61.6 |
53.2 |
54.6 |
59.8 |
56.3 |
44.5 |
43.0 |
51.6 |
51.9 |
45.9 |
51.2 |
62.5 |
61.2 |
52.9 |
54.9 |
59.8 |
55.8 |
44.1 |
43.3 |
51.9 |
51.6 |
45.8 |
51.8 |
62.8 |
60.9 |
52.7 |
55.2 |
59.7 |
55.3 |
43.7 |
43.6 |
52.1 |
51.3 |
45.8 |
52.3 |
63.1 |
60.5 |
52.6 |
55.5 |
59.7 |
54.8 |
43.3 |
43.9 |
52.4 |
51.0 |
45.8 |
52.9 |
63.3 |
60.1 |
52.4 |
55.8 |
59.6 |
54.3 |
43.0 |
44.3 |
52.6 |
50.7 |
45.8 |
53.5 |
63.5 |
59.6 |
52.3 |
56.2 |
59.4 |
53.8 |
42.7 |
44.7 |
52.8 |
50.4 |
45.8 |
54.0 |
63.7 |
59.2 |
52.2 |
56.5 |
59.3 |
53.2 |
42.4 |
45.1 |
53.0 |
50.1 |
45.9 |
54.6 |
63.8 |
58.8 |
52.2 |
56.8 |
59.0 |
52.6 |
42.2 |
45.5 |
53.1 |
49.7 |
46.0 |
55.2 |
63.9 |
58.3 |
52.2 |
57.1 |
58.8 |
52.1 |
42.0 |
45.9 |
53.2 |
49.4 |
46.1 |
55.8 |
63.9 |
57.9 |
52.2 |
57.4 |
58.5 |
51.5 |
41.9 |
46.3 |
53.3 |
49.1 |
46.3 |
56.4 |
63.9 |
57.5 |
52.2 |
57.7 |
|
50.9 |
41.7 |
46.8 |
53.4 |
48.7 |
46.5 |
56.9 |
63.9 |
57.0 |
52.3 |
58.0 |
|
50.3 |
41.7 |
47.2 |
53.4 |
48.4 |
46.7 |
57.5 |
63.9 |
56.6 |
52.4 |
58.3 |
|
49.7 |
41.6 |
47.6 |
53.4 |
48.1 |
47.0 |
58.1 |
63.8 |
56.2 |
52.5 |
58.6 |
|
49.2 |
41.6 |
48.1 |
53.4 |
47.8 |
47.3 |
58.6 |
63.7 |
55.8 |
52.6 |
58.8 |
|
48.6 |
41.6 |
48.5 |
53.3 |
47.5 |
47.6 |
59.1 |
63.5 |
55.4 |
52.8 |
59.0 |
|
48.0 |
41.7 |
48.9 |
53.2 |
47.3 |
48.0 |
59.6 |
63.3 |
55.0 |
53.0 |
59.2 |
|
47.5 |
41.8 |
49.4 |
53.1 |
47.0 |
48.4 |
60.1 |
63.1 |
54.7 |
53.2 |
59.4 |
|
表12:主轴线曲折度在Y轴上的分量序列(单位:μm):
9)根据步骤8)计算的X、Y轴上的分量序列X[n]、Y[n],分别计算主轴线相对于+X、+Y轴的曲折度平均值,计算公式如下:
10)根据步骤9)计算的主轴线相对于+X、+Y轴上的曲折度平均值,按矢量方式合成总的主轴线曲折度及对应的曲折方位,计算公式如下:
即通过计算,主轴线曲折度为60μm,主轴线曲折方位在-28°,曲折示意图如图4;
11)根据步骤1)实时采集的轴承摆度波形值,按步骤2)-10),实时计算水轮发电机轴主轴线的曲折度及曲折方位,根据国标进行比较0.04mm/m=40um/m,本实施例1计算结果为:60μm,远大于国标允许的40um/m,表明该机组主轴线存在较大的曲折度。
根据本实施例1计算的主轴线曲折度及曲折方位,指导电厂及时开展了机组主轴线调整工作,即在机组检修时进行盘车实际测量,得到本水轮发电机主轴线的曲折度为58μm、方位在-30°,证实在-30°左右的方位存在较大的曲折度。
由此证明本发明方法准确、可行,值得推广。