CN102364839B - Assembly control method for high-current electrical connection spherical joints - Google Patents
Assembly control method for high-current electrical connection spherical joints Download PDFInfo
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Abstract
The invention relates to an assembly control method for high-current electrical connection spherical joints. The method comprises the following steps of: selecting a connecting copper bar with a proper size according to a distance between the spherical joints; and gripping the spherical joints by using the connecting copper bar, sequentially arranging four bolts and conveniently screwing nuts. The method is characterized by further comprising the following steps of: starting increasing the wrenching moment of the bolt from a relatively lower initial value according to a given gear, wrenching second and third bolts alternately by a semicircle under each gear until the second and third bolts are wrenched to the moment of the gear, and wrenching first and fourth bolts alternately by the semicircle until the first and fourth bolts are wrenched to the moment of the gear; and when the wrenching moment of the bolt is increased to a given moment from the initial value, regulating the clearance of a certain point not meeting requirements to a certain extent. The method has the advantages of 1, improving the assembly quality of the connecting copper bar, and 2, improving production efficiency.
Description
Technical field
The present invention relates to a kind of large-current electric and connect globe joint assembling control method, connect the assembling of arranging for layer line rod series connection about the stator of steam turbine generator with the globe joint that is connected with the parallel connection ring.
Background technology
The globe joint mechanical connection manner is adopted in water-hydrogen generator stator bar end, reduced the influence of levels coil connectors position deviation to being electrically connected, that realizes to a certain extent flexibly connects, both improve the end winding bonding strength, reduced the harsh requirement of plane contact mechanical connection to the electricity generator stator coil end shape again.Assembly equipment and measuring means are oversimplified simultaneously, are breakthroughs of electricity generator stator coil connected mode.
It is the important component part of generator circuit that globe joint copper connects row, and the contact condition of inside and outside spheroid directly has influence on the electrical connection of upper and lower coil connectors; If loose contact may cause being distributed in the current density inequality on each spheroid, the part causes heating even scaling loss, and globe joint assembling situation has directly determined to connect the contact condition of copper bar and globe joint.
Because the quality of globe joint connection copper bar assembling directly influences the long-term safety of generator, normal operation, so the quality of globe joint connection copper bar assembling is particularly important.
As shown in Figure 1, globe joint connects the important evidence that 4 gaps (i.e. first gap 6, second gap 7, third space 8 and the 4th gap 9) of copper bar are judgement connection row installation qualities.So when installing, guarantee that 4 gaps of globe joint are in the scope that requires.
Connect in the copper bar assembling at globe joint, according to traditional custom, be after connecting row by the selection of dimension globe joint, tighten and connect last 4 bolts of row (i.e. first bolt 2, second bolt 3, the 3rd bolt 4 and the 4th bolt 5), its operating process is: plate is tight successively with four bolts as initial torque with a less regulation moment earlier, adopt common clearance gauge to measure 4 gaps whether within the scope that requires then, if it is defective, then take refitting apart, though if in the scope that requires but the gap is bigger, then increase the tight moment of plate, that bolt that will be corresponding with this gap is wrenched with the adjusting play.Increase by shelves as requested and be wrenched moment, successively that four Bolt plates are tight in each gear, and by 4 gaps of clearance gauge inspection, underproof needs are taken refitting apart, and excesssive gap, then need to increase moment adjustment.The shortcoming of said method is:
The first, influence assembly quality:
When traditional connection copper bar assembled, 4 gaps often can not be controlled within the scope that requires, and underproof assembling must be taken refitting apart, and the globe joint surface has formed certain impression, certainly will exert an influence to the secondary assembling.
The second, production efficiency is low:
In installation process, need the point of slowly adjustment too much because of some some excesssive gap, prolonged the time that connects the copper bar installation, in case of failure is installed, the required man-hour of doing over again is longer; And use common clearance gauge, blocks of method of measurement of adding patch has also slowed down installation rate to a certain extent.
Therefore, traditional method is not suitable for the assembling that globe joint connects row's copper.
Summary of the invention
The purpose of this invention is to provide a kind of large-current electric and connect globe joint assembling control method, can save installation time by this method, guarantee assembly quality, enhance productivity.
In order to achieve the above object, technical scheme of the present invention has provided a kind of large-current electric and has connected globe joint assembling control method, the steps include:
The moment of being wrenched of step 3, bolt increases since a less initial value shelves number according to the rules, under each gear earlier with second bolt and the 3rd bolt with half-turn as replacing till the moment of pulling this gear, again with first bolt and the 4th bolt with half-turn as alternately till the moment of pulling this gear, subsequently, measure first gap, second gap, thirdly gap and the 4th gap respectively with special feeler gauge, then do not take refitting apart if do not meet the demands;
Advantage of the present invention is:
The first, improve the assembly quality that connects copper bar:
Technology of the present invention, can guarantee that Bolt Torque is when 102Nm, the gap is the value of meeting the requirements of substantially, as long as can make the gap all reach required value by the minority bolt being applied less moment, and the difference of each point is less, the gap is controlled fully, can not produce to do over again and influence the situation of globe joint assembly quality.
The second, enhance productivity:
Because for the moment of each grade, the difference in 4 gaps is all little in the installation process, thereby effective must the minimizing needs to increase the number of times that moment is adjusted temporarily in the installation process, makes operation work step and measure number of times and significantly reduce, and saved the set-up time greatly.The phenomenon of doing over again do not occur, guarantee the smooth of installation process.Use special feeler gauge to replace common clearance gauge, reduced the Measuring Time of every work step.
Description of drawings
Fig. 1 connects row's assembling schematic diagram for globe joint copper;
Fig. 2 connects row installation time crack and bolt schematic diagram for globe joint copper;
Fig. 3 is special feeler gauge schematic diagram.
Embodiment
For the present invention is become apparent, now with a preferred embodiment, and conjunction with figs. is described in detail below.
In conjunction with Fig. 1 to Fig. 3, a kind of large-current electric that present embodiment provides connects globe joint assembling control method, the steps include:
Claims (1)
1. a large-current electric connects globe joint assembling control method, the steps include:
Step 1, select the copper of suitable dimension to connect row (1) according to the distance of globe joint (10);
Step 2, copper is connected row's (1) obvolvent globe joint (10), first bolt (2) of packing into successively, second bolt (3), the 3rd bolt (4) and the 4th bolt (5) and fastening nut conveniently is characterized in that:
Step 3, the initial value of being wrenched moment of bolt is set 20Nm, alternately be wrenched second bolt (3) and the 3rd bolt (4), pull half-turn at every turn, after this moment, be wrenched first bolt (2) and the 4th bolt (5) with same method, subsequently, measure 4 gaps that globe joint connects copper bar respectively with feeler gauge (11), i.e. first gap (6), second gap (7), thirdly gap (8) and the 4th gap (9), if first gap (6) and the 4th gap (9) difference are not more than 0.6mm, and the front and back difference is not more than 0.5mm, then continuation, otherwise, take refitting apart;
Step 4, with 34Nm as second grade of moment, alternately be wrenched second bolt (3) and the 3rd bolt (4), pull half-turn at every turn, after this moment, be wrenched first bolt (2) and the 4th bolt (5 with same method; Subsequently, measure first gap (6), second gap (7), thirdly gap (8) and the 4th gap (9) respectively with feeler gauge (11), if first gap (6) and the 4th gap (9) difference diminish, and first gap (6) is not more than 0.45mm with the difference in the 4th gap (9), second gap (7) reaches thirdly, and gap (8) difference is not more than 0.25mm, then continue, otherwise, refitting taken apart;
Step 5, with 61Nm as third gear moment, alternately be wrenched second bolt (3) and the 3rd bolt (4), pull half-turn at every turn, after this moment, be wrenched first bolt (2) and the 4th bolt (5) with same method; Subsequently, measure first gap (6), second gap (7), thirdly gap (8) and the 4th gap (9) respectively with feeler gauge (11), if first gap (6) and the 4th gap (9) difference are not more than 0.40mm, and second gap (7) reaches thirdly, and gap (8) difference is not more than 0.1mm, then continue, otherwise, take refitting apart;
Step 6, if first gap (6) and the 4th gap (9) difference greater than 0.3mm, then alternately be wrenched first bolt (2) and the 4th bolt (5) with 80Nm as being wrenched moment, pull 1/4th circles at every turn, after making first gap (6) and the 4th gap (9) gap width difference be not more than 0.3mm, alternately be wrenched second bolt (3) and the 3rd bolt (4) with 102Nm as fourth speed moment, pull half-turn at every turn, after this grade moment, be wrenched first bolt (2) and the 4th bolt (5) with same method; Otherwise, directly alternately be wrenched second bolt (3) and the 3rd bolt (4) with 102Nm as fourth speed moment, pull half-turn at every turn, after this grade moment, be wrenched first bolt (2) and the 4th bolt (5) with same method;
Step 7, measure first gap (6), second gap (7), thirdly gap (8) and the 4th gap (9) respectively with feeler gauge (11), if the maximum of 4 gap differences between any two is not more than 0.38mm, and 4 gaps are neither greater than 4.06mm, then finish; Otherwise the tight moment of plate is from 110Nm, increase with the amplitude of 10Nm, on be limited to 155Nm, alternately be wrenched the more a little bigger corresponding bolt in gap, pull 1/4th circles at every turn.
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CN 201110337377 CN102364839B (en) | 2011-10-31 | 2011-10-31 | Assembly control method for high-current electrical connection spherical joints |
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CN 201110337377 CN102364839B (en) | 2011-10-31 | 2011-10-31 | Assembly control method for high-current electrical connection spherical joints |
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CN102364839B true CN102364839B (en) | 2013-09-04 |
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CN102990163B (en) * | 2012-11-30 | 2014-08-20 | 上海电气电站设备有限公司 | Repairing method for large-current electric-connection spherical joint of electric generator |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US5809632A (en) * | 1995-07-13 | 1998-09-22 | Jeumont Industrie | Method for repairing a cooling fluid box of an electric alternator stator bar |
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US5809632A (en) * | 1995-07-13 | 1998-09-22 | Jeumont Industrie | Method for repairing a cooling fluid box of an electric alternator stator bar |
Non-Patent Citations (2)
Title |
---|
巧换轮胎;陈茂春;《农业科技与信息》;20000930(第09期);第37页 * |
陈茂春.巧换轮胎.《农业科技与信息》.2000,(第09期), |
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