CN103322893A - Generator connecting bolt elongation value measuring method, measuring device thereof and use method - Google Patents
Generator connecting bolt elongation value measuring method, measuring device thereof and use method Download PDFInfo
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- CN103322893A CN103322893A CN2013102765304A CN201310276530A CN103322893A CN 103322893 A CN103322893 A CN 103322893A CN 2013102765304 A CN2013102765304 A CN 2013102765304A CN 201310276530 A CN201310276530 A CN 201310276530A CN 103322893 A CN103322893 A CN 103322893A
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- attachment bolt
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- sounding rod
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Abstract
The invention provides a generator connecting bolt elongation value measuring method, a measuring device thereof and a use method. According to the generator connecting bolt elongation value measuring device, by using the center hole design of a connecting bolt, a length measuring instrument is manufactured, a measuring rod of the length measuring instrument is inserted into the center hole to measure the length of an exposed part, and then two measuring values before and after installation are subjected to subtraction to obtain an elongation value of the connecting bolt. According to the measurement method, measurement of multiple sections is not needed, the accuracy of the measurement of the connecting bolt elongation value is raised, the fastening quality of the connecting bolt is raised, and the uniform stress of each connecting bolt is ensured.
Description
Technical field
Type of the present invention relates to generator safety detection field, relates in particular to a kind of generator attachment bolt measurement of elongation method, measurement mechanism and using method thereof.
Background technology
The attachment bolt of generator amature and generator shaft, upper axle needs to measure the stretch value of attachment bolt in the dismounting maintenance.As shown in Figure 1, nut 12 ' and the distance h 2 of flange face and the distance of screw rod 11 ' upper end and nut 12 ' upper plane h1 were measured respectively in general employing when measuring in the past, two distance value additions are obtained the distance H of screw rod 11 ' upper end and flange face, respectively measure the H value one time before and after the attachment bolt 1 ' dismounting, it is the stretch value of attachment bolt 1 ' that twice measurement result subtracted each other.
But there is following shortcoming in this measurement technique: 1, measure respectively two distances and inevitably produce cumulative errors; 2, screw rod 11 ', nut 12 ' and flange face are easily collided with, are produced small deformation in maintenance process, affect the authenticity of measurement data.Above-mentioned shortcoming can cause measuring error large, affects attachment bolt 1 ' measurement of elongation, the quality of adjusting is installed, and it is bad that final consequence is exactly bearing attachment bolt 1 ' installation quality.
Summary of the invention
The invention provides a kind of generator attachment bolt measurement of elongation method, measurement mechanism and using method thereof, to guarantee generator amature and generator shaft or upper axle attachment bolt measurement of elongation, to adjust quality.
For achieving the above object, the invention provides a kind of generator attachment bolt measurement of elongation device, be used for measuring the attachment bolt of connection generator amature and generator shaft or upper axle at the stretch value of dismounting maintenance, screw rod in the described attachment bolt axially has a center pit along it, described measurement mechanism comprises comparator, described comparator comprises sounding rod, the center pit of the shape of described sounding rod xsect and size and described screw rod is complementary, and the length of described sounding rod is greater than the length of described center pit.
Further, the center pit of the shape of the lower end of described sounding rod and described screw rod is complementary near the shape of an end of the nut of described attachment bolt.
Further, described sounding rod is marked with scale.
Further, the scale on the described sounding rod is initial from the upper end of described sounding rod.
Further, described comparator also comprises reference block, has a perforate in the described reference block, and the shape of described sounding rod xsect and size and described perforate are complementary.
Further, the upper and lower end face of described reference block is all smooth.
Further, described measurement mechanism also comprises vernier caliper, and described vernier caliper is used for measuring the length of required measurement on the described sounding rod.
The present invention also provides a kind of using method of above-mentioned generator attachment bolt measurement of elongation device, and described using method comprises:
Steps A: the lower end of described sounding rod is inserted in the described center pit, until the lower end of described sounding rod arrives described center pit near an end of the nut of described attachment bolt;
Step B: measure described sounding rod exposed portions serve length by observation or use survey instrument.
Further, in described step B, first described reference block is passed described sounding rod and place on the described attachment bolt, again by observation or use survey instrument to measure described sounding rod exposed portions serve length, described exposed portions serve length refers to the distance of the upper surface of the upper end of described sounding rod and described reference block.
The present invention also provides a kind of generator attachment bolt measurement of elongation method, described measuring method uses above-mentioned generator attachment bolt measurement of elongation device and using method thereof to measure the stretch value of attachment bolt in the dismounting maintenance of connection generator amature and generator shaft or upper axle, and described measuring method comprises:
Step 1: utilize described generator attachment bolt measurement of elongation device and using method thereof to measure first the described sounding rod exposed portions serve length of comparator in each attachment bolt before the maintenance;
Step 2: its screw rod of rear dismounting and nut are unclamped in the attachment bolt heating, after attachment bolt cools off fully, again utilize described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod exposed portions serve length of comparator in each attachment bolt, twice measured value subtracted each other the first stretch value that is each attachment bolt;
Step 3: attachment bolt utilizes described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod exposed portions serve length of comparator in each front attachment bolt of attachment bolt heating before returning dress after the maintenance;
Step 4: attachment bolt all returns dress by sequence number, heats first pretension one attachment bolt, cools off to check after 12 hours that this attachment bolt of affirmation extends;
Step 5: all the other attachment bolts are heated pretension by 0.30mm ± 10% requirement, then by 0.30mm ± 10% requirement all the other bolts are heated pretension again after the bolt heating of first pretension being unclamped, after all attachment bolts cool off fully, utilize described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod exposed portions serve length of comparator in each attachment bolt, the conjunction measured value that obtains after the maintenance is subtracted each other the second stretch value that is each attachment bolt.
Compared with prior art, the present invention has following beneficial effect:
Generator attachment bolt measurement of elongation device provided by the invention utilizes center pit design, the making comparator of attachment bolt, insert described center pit to measure its exposed portions serve length by the sounding rod with described comparator, again twice measured value before and after the dismounting subtracted each other to obtain the stretch value of attachment bolt, this metering system need not to carry out multistage and measures, improved the degree of accuracy of attachment bolt measurement of elongation, improve the attachment bolt fastening quality, guaranteed the stressed even of each attachment bolt.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is the scheme of installation of attachment bolt in the prior art;
The structural representation of the generator attachment bolt measurement of elongation device that Fig. 2 provides for the embodiment of the invention;
The position view of generator attachment bolt measurement of elongation device when measuring that Fig. 3 provides for the embodiment of the invention;
The process flow diagram of the using method of the generator attachment bolt measurement of elongation device that Fig. 4 provides for the embodiment of the invention;
The process flow diagram of the generator attachment bolt measurement of elongation method that Fig. 5 provides for the embodiment of the invention.
In Fig. 1 to Fig. 3,
1 ': attachment bolt; 11 ': screw rod; 12 ': nut; 1: attachment bolt; 11: screw rod; 111: center pit; 12: nut; 2: comparator; 21: sounding rod; 22: reference block; 221: perforate.
Embodiment
Below in conjunction with the drawings and specific embodiments generator attachment bolt measurement of elongation method, measurement mechanism and the using method thereof that the present invention proposes is described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-accurately ratio, only in order to convenient, the purpose of the aid illustration embodiment of the invention lucidly.
Core concept of the present invention is, a kind of generator attachment bolt measurement of elongation method is provided, measurement mechanism and using method thereof, described generator attachment bolt measurement of elongation device utilizes the center pit design of attachment bolt, make comparator, insert described center pit to measure its exposed portions serve length by the sounding rod with described comparator, again twice measured value before and after the dismounting subtracted each other to obtain the stretch value of attachment bolt, this metering system need not to carry out multistage and measures, improved the degree of accuracy of attachment bolt measurement of elongation, improve the attachment bolt fastening quality, guaranteed the stressed even of each attachment bolt.
Please refer to Fig. 2 to 5, the structural representation of the generator attachment bolt measurement of elongation device that Fig. 2 provides for the embodiment of the invention; The position view of generator attachment bolt measurement of elongation device when measuring that Fig. 3 provides for the embodiment of the invention; The process flow diagram of the using method of the generator attachment bolt measurement of elongation device that Fig. 4 provides for the embodiment of the invention; The process flow diagram of the generator attachment bolt measurement of elongation method that Fig. 5 provides for the embodiment of the invention.
Please emphasis referring to figs. 2 and 3, as shown in Figures 2 and 3, the embodiment of the invention provides a kind of generator attachment bolt measurement of elongation device, be used for measuring the attachment bolt 1 of connection generator amature and generator shaft or upper axle at the stretch value of dismounting maintenance, screw rod 11 in the described attachment bolt 1 axially has a center pit 111 along it, described measurement mechanism comprises comparator 2, described comparator 2 comprises sounding rod 21, the center pit 111 of the shape of described sounding rod 21 xsects and size and described screw rod 11 is complementary, and the length of described sounding rod 21 is greater than the length of described center pit 111.
Further, the center pit 111 of the shape of the lower end of described sounding rod 21 and described screw rod 11 is complementary near the shape of an end of the nut 12 of described attachment bolt 1.
Further, described sounding rod 21 is marked with the scale (not shown), and the scale on the described sounding rod 21 is initial from the upper end of described sounding rod 21.
Further, described comparator 2 also comprises reference block 22, have a perforate 221 in the described reference block 22, the shape of described sounding rod 21 xsects and size and described perforate 221 are complementary, the upper and lower end face of described reference block 22 is all smooth, and the design of described reference block 22 has been avoided owing to flange face is easily collided with, produces the measuring error that small deformation produces in maintenance process.
Further, described measurement mechanism also comprises the vernier caliper (not shown), and described vernier caliper is used for measuring the length of required measurement on the described sounding rod 21, i.e. hereinafter described sounding rod 21 exposed portions serve length.
Please emphasis with reference to figure 4, and in conjunction with Fig. 2 and Fig. 3, to shown in Figure 4, the embodiment of the invention also provides a kind of using method of above-mentioned generator attachment bolt measurement of elongation device such as Fig. 2, described using method comprises:
Steps A: the lower end of described sounding rod 21 is inserted in the described center pit 111, until the lower end of described sounding rod 21 arrives described center pit 111 near an end of the nut 12 of described attachment bolt 1;
Step B: by observation on the sounding rod 21 scale or use survey instrument measure (such as above-mentioned vernier caliper) draw as described in sounding rod 21 exposed portions serve length.
Further, in described step B, first described reference block 22 is passed described sounding rod 21 and place on the described attachment bolt 1, again by observation on the sounding rod 21 scale or use survey instrument measure (such as above-mentioned vernier caliper) draw as described in sounding rod 21 exposed portions serve length, described exposed portions serve length refers to the distance of the upper surface of the upper end of described sounding rod 21 and described reference block 22.
Please emphasis with reference to figure 5, and in conjunction with Fig. 2 to Fig. 4, extremely shown in Figure 5 such as Fig. 2, the embodiment of the invention also provides a kind of generator attachment bolt measurement of elongation method, described measuring method uses above-mentioned generator attachment bolt measurement of elongation device and using method thereof to measure the stretch value of attachment bolt in the dismounting maintenance of connection generator amature and generator shaft or upper axle, and described measuring method comprises:
Step 1: utilize described generator attachment bolt measurement of elongation device and using method thereof to measure first the described sounding rod 21 exposed portions serve length of comparator 2 in each attachment bolt 1 before the maintenance;
Step 2: its screw rod 11 of rear dismounting and nut 12 are unclamped in attachment bolt 1 heating, after attachment bolt 1 cools off fully, again utilize described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod 21 exposed portions serve length of comparator 2 in each attachment bolt, twice measured value subtracted each other the first stretch value that is each attachment bolt 1;
Step 3: the described sounding rod 21 exposed portions serve length of utilizing comparator 2 in each attachment bolt 1 before described generator attachment bolt measurement of elongation device and using method thereof are measured attachment bolt 1 heating after the maintenance before 1 time dress of attachment bolt;
Step 4: attachment bolt 1 all returns dress by sequence number, heats first pretension one attachment bolt, cools off to check after 12 hours that this attachment bolt of affirmation extends;
Step 5: by the 0.30mm(millimeter) ± 10% requirement is all the other attachment bolts heating pretension, then by 0.30mm ± 10% requirement all the other attachment bolts are heated pretension again after the attachment bolt heating of first pretension being unclamped, after all attachment bolts 1 cool off fully, utilize described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod 21 exposed portions serve length of comparator in each attachment bolt 1, twice measured value that obtains after the maintenance subtracted each other the second stretch value that is each attachment bolt 1.
In the present embodiment, described the first stretch value is used for it being adjusted and overhauling the described attachment bolt of dismounting 1 is rear, guarantees that it connects precision; Whether the precision after described the second stretch value is adjusted for detection of described attachment bolt 1 is in specialized range.
The generator attachment bolt measurement of elongation device that the embodiment of the invention provides utilizes center pit 111 designs, the making comparator 2 of attachment bolt 1, insert described center pit 111 to measure its exposed portions serve length by the sounding rod 21 with described comparator 2, again twice measured value before and after the dismounting subtracted each other to obtain the stretch value of attachment bolt 1, this metering system need not to carry out multistage and measures, improved the degree of accuracy of attachment bolt 1 measurement of elongation, improve attachment bolt 1 fastening quality, guaranteed the stressed even of each attachment bolt 1.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are changed and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. generator attachment bolt measurement of elongation device, be used for measuring the attachment bolt of connection generator amature and generator shaft or upper axle at the stretch value of dismounting maintenance, it is characterized in that, screw rod in the described attachment bolt axially has a center pit along it, described measurement mechanism comprises comparator, described comparator comprises sounding rod, and the center pit of the shape of described sounding rod xsect and size and described screw rod is complementary, and the length of described sounding rod is greater than the length of described center pit.
2. generator attachment bolt measurement of elongation device according to claim 1 is characterized in that, the shape of the lower end of described sounding rod and the center pit of described screw rod are complementary near the shape of an end of the nut of described attachment bolt.
3. generator attachment bolt measurement of elongation device according to claim 2 is characterized in that, described sounding rod is marked with scale.
4. generator attachment bolt measurement of elongation device according to claim 3 is characterized in that, the scale on the described sounding rod is initial from the upper end of described sounding rod.
5. generator attachment bolt measurement of elongation device according to claim 1 is characterized in that, described comparator also comprises reference block, has a perforate in the described reference block, and the shape of described sounding rod xsect and size and described perforate are complementary.
6. generator attachment bolt measurement of elongation device according to claim 5 is characterized in that, the upper and lower end face of described reference block is all smooth.
7. according to claim 1 to 6 each described generator attachment bolt measurement of elongation devices, it is characterized in that, described measurement mechanism also comprises vernier caliper, and described vernier caliper is used for measuring the length of required measurement on the described sounding rod.
8. the using method of generator attachment bolt measurement of elongation device as described in claim 1 is characterized in that, comprising:
Steps A: the lower end of described sounding rod is inserted in the described center pit, until the lower end of described sounding rod arrives described center pit near an end of the nut of described attachment bolt;
Step B: measure described sounding rod exposed portions serve length by observation or use survey instrument.
9. the using method of generator attachment bolt measurement of elongation device according to claim 8, it is characterized in that, described comparator also comprises reference block, have a perforate in the described reference block, the shape of described sounding rod xsect and size and described perforate are complementary, in described step B, first described reference block is passed described sounding rod and place on the described attachment bolt, again by observation or use survey instrument to measure described sounding rod exposed portions serve length, described exposed portions serve length refers to the distance of the upper surface of the upper end of described sounding rod and described reference block.
10. generator attachment bolt measurement of elongation method, it is characterized in that, described measuring method is used such as generator attachment bolt measurement of elongation device mentioned in the claim 8 and using method thereof and is measured the stretch value of attachment bolt in the dismounting maintenance that connects generator amature and generator shaft or upper axle, and described measuring method comprises:
Step 1: utilize described generator attachment bolt measurement of elongation device and using method thereof to measure first the described sounding rod exposed portions serve length of comparator in each attachment bolt before the maintenance;
Step 2: its screw rod of rear dismounting and nut are unclamped in the attachment bolt heating, after attachment bolt cools off fully, again utilize described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod exposed portions serve length of comparator in each attachment bolt, twice measured value subtracted each other the first stretch value that is each attachment bolt;
Step 3: attachment bolt utilizes described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod exposed portions serve length of comparator in each front attachment bolt of attachment bolt heating before returning dress after the maintenance;
Step 4: attachment bolt all returns dress by sequence number, heats first pretension one attachment bolt, cools off to check after 12 hours that this attachment bolt of affirmation extends;
Step 5: all the other attachment bolts are heated pretension by 0.30mm ± 10% requirement, then by 0.30mm ± 10% requirement all the other bolts are heated pretension again after the bolt heating of first pretension being unclamped, after all attachment bolts cool off fully, utilize described generator attachment bolt measurement of elongation device and using method thereof to measure the described sounding rod exposed portions serve length of comparator in each attachment bolt, the conjunction measured value that obtains after the maintenance is subtracted each other the second stretch value that is each attachment bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102765304A CN103322893A (en) | 2013-07-03 | 2013-07-03 | Generator connecting bolt elongation value measuring method, measuring device thereof and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102765304A CN103322893A (en) | 2013-07-03 | 2013-07-03 | Generator connecting bolt elongation value measuring method, measuring device thereof and use method |
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|---|---|
| CN103322893A true CN103322893A (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013102765304A Pending CN103322893A (en) | 2013-07-03 | 2013-07-03 | Generator connecting bolt elongation value measuring method, measuring device thereof and use method |
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| CN (1) | CN103322893A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485125A (en) * | 2016-01-05 | 2016-04-13 | 洛阳双瑞特种装备有限公司 | Bolt capable of measuring pre-tightening elongation amount and measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3243306A1 (en) * | 1981-11-24 | 1983-06-09 | CKD Praha O.P., Praha | Device for measuring screw strain |
| CN200968840Y (en) * | 2006-11-08 | 2007-10-31 | 哈尔滨汽轮机厂有限责任公司 | Apparatus for measuring screw bolt elongation amount for steam turbine assembly measurement |
| CN201233211Y (en) * | 2008-08-04 | 2009-05-06 | 哈尔滨电机厂有限责任公司 | Large-sized shaft coupling bolt pretension, extension and fine measurement device |
| CN201688802U (en) * | 2010-06-01 | 2010-12-29 | 谭志 | Tool for measuring pre-elongation quantity of cylinder special-purpose screw bolt |
| CN102288086A (en) * | 2011-08-10 | 2011-12-21 | 中国北车集团大连机车车辆有限公司 | Indirect elongation method for making fastening screw accurate |
-
2013
- 2013-07-03 CN CN2013102765304A patent/CN103322893A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3243306A1 (en) * | 1981-11-24 | 1983-06-09 | CKD Praha O.P., Praha | Device for measuring screw strain |
| CN200968840Y (en) * | 2006-11-08 | 2007-10-31 | 哈尔滨汽轮机厂有限责任公司 | Apparatus for measuring screw bolt elongation amount for steam turbine assembly measurement |
| CN201233211Y (en) * | 2008-08-04 | 2009-05-06 | 哈尔滨电机厂有限责任公司 | Large-sized shaft coupling bolt pretension, extension and fine measurement device |
| CN201688802U (en) * | 2010-06-01 | 2010-12-29 | 谭志 | Tool for measuring pre-elongation quantity of cylinder special-purpose screw bolt |
| CN102288086A (en) * | 2011-08-10 | 2011-12-21 | 中国北车集团大连机车车辆有限公司 | Indirect elongation method for making fastening screw accurate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485125A (en) * | 2016-01-05 | 2016-04-13 | 洛阳双瑞特种装备有限公司 | Bolt capable of measuring pre-tightening elongation amount and measuring method |
| CN105485125B (en) * | 2016-01-05 | 2018-02-02 | 洛阳双瑞特种装备有限公司 | A kind of bolt and measuring method for surveying pretension elongation |
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Application publication date: 20130925 |