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A technology of centering device and fixing frame, which is applied in the direction of measuring device, adopting mechanical device, mechanical measuring device, etc., and can solve the problems of error-prone and cumbersome operation
Active Publication Date: 2012-06-20
CHINA NUCLEAR IND 23 CONSTR
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This method requires multiple measurements and deflection correction for each set of measurement data, which is cumbersome to operate and prone to errors
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[0019] Such as Figures 2 to 4 所示,本发明无挠度对中装置包括固定架1、支撑架2和连接件3。固定架1为由上、下两个相互平行的杆状件4通过两个螺杆或螺栓5连接形成的四边形框架结构,优选矩形框架结构,以夹持两个待对中轴6中的一个,将无挠度对中装置固定到该待对中轴6上。在下杆状件4的下侧面上垂直设有向下延伸的固定杆7。当然,固定杆7也可以垂直设在上杆状件4的上侧面上并向上延伸。支撑架2为由垂直支撑板8和水平支撑板9垂直连接构成的背向固定架1的直角结构,其中,垂直支撑板8与固定杆7平行,水平支撑板9与固定杆7垂直,并在垂直支撑板8上架设有两个测量待对中轴6的平行度的偏差的端面百分表10,水平支撑板9上架设有测量待对中轴6的同心度的偏差的环面百分表11。连接件3的左端与垂直支撑板8的下端垂直连接,右端与固定杆7的自由端即下端垂直连接,即支撑架2和固定架1均位于连接件3的上方。调节杆12的左端与固定杆7的下端垂直连接,且在沿连接件3向右延伸的方向上向右延伸,并在调节杆12上套设有配重13。
[0020] Such as Figures 2 to 4 所示,杆状件4为长方体形的板状结构,并在两个杆状件4的相向面上设有相向的V型结构,该V型结构上的V型凹槽贯通杆状件4的两个侧面。优选地,V型结构位于杆状件4的中部。当然,也可以直接在杆状件4上开V型槽,还可以将凹槽开成半圆柱形或其它形状,只要能够牢固夹持住待对中轴,并使其无法再固定架1的内部滑动即可。在杆状件4上靠近端部的位置上设有通孔,以与螺杆或螺栓5连接。当然,杆状件4也可以是圆柱状杆。固定杆7与杆状件4的连接部位与V型槽的中部所在的位置相对应。
[0021] Such as figure 2 , 3 和5所示,支撑架2为有一定宽度且有一定厚度的 型结构,由垂直支撑板8和水平支撑板9构成。其中,垂直支撑板8可以是长方体形的板状结构,还可以是长方体形空心杆状结构;水平支撑板9也可以是长方体形板状结构或长方体形空心杆状杆。在垂直支撑板8上设有两个用来架设端面百分表10的轴向通孔14,且轴向通孔14分别靠近垂直支撑板8的两端。当然,还可以在垂直支撑板上设置多个备用轴向通孔,这样,就可以使用同一个对中装置对主轴径向尺寸不同的转动设备进行对中。在垂直支撑板8上距离轴向通孔...
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Abstract
The invention relates to a centering device which is used for solving the problem that the deflection of the existing centering device influences the accuracy of measured data. A no-deflection centering device comprises a fixing bracket, a support frame and a connecting part, wherein the fixing bracket is a quadrilateral frame structure comprising an upper rod-like part and a lower rod-like part, which are in parallel, opposite grooves are arranged on opposite surfaces of the rod-like parts to clamp one shaft in two structures to be centered, the lower side surface of the lower rod-like part, corresponding to the center of the groove, is vertically extended downwards to form a fixing rod; a vertical support plate on the support frame, parallel to the fixing bracket, forms a right angled structure with a back opposite to the fixing frame together with a horizontal support plate, so as to bear the other shaft in the two structures to be centered; two ends of the connecting part are respectively connected with the lower end of the vertical support plate and the lower end of the fixing rod, the lower end of the fixing rod is vertically connected with an adjusting rod, a counter weight is sheathed on the adjusting rod, an end surface measuring instrument is arranged on the vertical support plate, and an annular surface measuring instrument is arranged on the horizontal support plate, in the way, the centering device can eliminate the effect of the deflection on the measuring results.
Description
technical field [0001] 本发明涉及机械、石油、化工及核电等行业的设备安装和检修领域,尤其涉及用于对核电站中的转动设备进行对中的对中装置。 Background technique [0002] 在机械、石油、化工及核电的设备安装和检修行业,转动设备的主轴对中是转动设备安装和检修的重要内容之一,主轴对中良好,可以减少转动设备的轴承、机械密封以及联轴器的磨损,进而减少设备出现故障的概率,提高运行效率,延长设备的使用寿命,减少能耗。但是,根据国际权威机构的调研结果表明,至少有70%的转动设备没有得到正确的对中及检修服务。 [0003] 对核电站内的卧式转动设备的安装及检修,通常是采用如 figure 1 所示的磁力表架架设百分表来对转动设备的主轴进行对中。百分表架设在表架01上,表架01的一端与连杆02连接,且表架01可以绕连接部位转动,连杆02再通过蝴蝶扣03与连杆04连接,并通过连杆04安装在磁力表座05上。这种磁力表架会产生挠度,影响对中结果。原因在于,首先,由于百分表、表架01、连杆02以及连杆04受重力作用而产生挠度,且表架01和连杆02的长度越长,挠度越大;百分表和表架01以及连杆02的重量越大,挠度也越大。其次,由于该磁力表架上的蝴蝶扣以及其他连接部位均为可活动的连接,容易导致连接处松动,将使表架挠度加大。最后,由于使用过程中磁力表架的连接部位磨损后,更容易出现固定不牢和松动,导致表架挠度不断加大。这样,磁力表架挠度大小一般是对中公差的10倍左右,严重影响测量结果的准确性。 [0004] 为解决现有的对中装置的挠度对测量结果精度的不利影响,通常采用的测量方法是,在实际对中之前,先将表架安装在一段标准直管上,使该标准直管水平放置,测量出百分表位于标准直管在竖直方向最高点处的值a,再旋转标准直管,测量出百分表位于标准直管在竖直方向最低点处的值b,可得出对中装置的挠度值为(a-b) / 2;然后利用该挠度值对实际对中结果进行修正。这种方法,需进行多次测量,且要对每一组测量数据进行挠度修正,操作繁琐,且易出现错误。 Contents of the invention [0005] 为提高现有百分表对中技术测量数据的准确性,简化对中操作,解决对中过程易出现错误的问题,本发明提出了一种无挠度对中装置,所述无...
Claims
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