CN107816481A - A kind of dual safety protector of Hydropower Unit top cover bindiny mechanism - Google Patents
A kind of dual safety protector of Hydropower Unit top cover bindiny mechanism Download PDFInfo
- Publication number
- CN107816481A CN107816481A CN201711016867.6A CN201711016867A CN107816481A CN 107816481 A CN107816481 A CN 107816481A CN 201711016867 A CN201711016867 A CN 201711016867A CN 107816481 A CN107816481 A CN 107816481A
- Authority
- CN
- China
- Prior art keywords
- nut
- screw rod
- top cover
- force transferring
- transferring part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/10—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt
- F16B39/108—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt with a locking washer under the nut or bolt head having at least one tongue or lug folded against the nut or bolt head, or against the object itself
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The present invention discloses a kind of dual safety protector of Hydropower Unit top cover bindiny mechanism, increase a force transferring part between the 3rd nut and top cover and on each screw rod, and acted on simultaneously on screw rod with the 3rd nut, and there is certain gap between the first nut on force transferring part and top cover, when unit normal work, the pressure of press water is acted on force transferring part, due to the mechanically contact of screw rod, the 3rd nut and force transferring part, effective mechanically contact between top cover and seat ring is ensure that, so as to ensure sealing strip sealing function；When screw rod and the 3rd nut produce wriggling; its stress is reduced; screw rod elastic deformation is gradually recovered; second nut falls and gradually and seat ring contact therewith; now, the second nut gradually bears load, so as to ensure that effective mechanically contact between top cover and seat ring; ensure that sealing strip can continue to play sealing function, play protection unit safety effect.
Description
Technical field
The present invention relates to a kind of dual safety protector of Hydropower Unit top cover bindiny mechanism.
Background technology
The stability run with user to water power power station, security requirement step up, and ensure Hydropower Unit safety
Stable operation has turned into an important indicator of examination operating states of the units.But Hydropower Unit is in the process of running, usually by
Being influenced each other in fluid, machinery, electromagnetism etc. causes unit vibration, top cover connecting bolt is acted on by alternate stress, easily makes connection
Bolts and nuts are wriggled.Further, since Hydropower Unit can be run under different heads, different operating modes, unit on-load
Range of operation is big, and start and stop is frequent, and is often in the characteristics of being run under non-optimal operating condition, causes suffered by top cover connecting bolt
Stress is in a higher level, causes the stress on top cover connecting bolt to fluctuate widely.Drawing water in Hydropower Unit
Accumulation of energy unit, which has concurrently, to draw water and generating function, can be in water pump and two kinds of hydraulic turbine condition, motor and generator opposite physics
The equipment of conversion operation between function, there is the characteristics of high water head, high rotating speed, operation of complicated multi-state, to the peace of unit operation
Total stability requires high.Water pump, hydraulic turbine condition conversion are more frequent in the operating condition, and change working process mesohigh
Lateral pressure amplitude of variation can be bigger, and stress level suffered by top cover connecting bolt is higher, and stress fluctuation is bigger.Therefore, Hydropower Unit
In the case where high stress level, frequently alternate stress and unit vibration act on, the probability that top cover attaching nut is wriggled can be significantly
Increase, and then weaken the mechanically contact between top cover and seat ring, the vibration of unit becomes big, makes the generation axial displacement of top cover,
The effect of sealing strip is set to fail, press water overflows unit and enters factory building, or even water logging factory building, so as to directly injure Hydropower Unit
Or even whole power plant is safe for operation.
In view of this, it is necessary to develop a kind of dual safety protector of Hydropower Unit top cover bindiny mechanism, connect spiral shell
When mother is wriggled, it can ensure there is reliable mechanical connection between top cover and seat ring.
The content of the invention
The present invention discloses a kind of dual safety protector of Hydropower Unit top cover bindiny mechanism, and the technical problem of solution is
Pressure luffing is excessive under different operating modes or unit vibration causes attaching nut to be wriggled, and causes to have lost between top cover and seat ring
During the mechanical connection of effect, Hydropower Unit safe operation is still ensured that.
The technical scheme is that：Increase by one between the 3rd nut (2) and top cover (3) and on each screw rod (1)
Force transferring part (8), the first nut (7) and the second nut (6), and with the 3rd nut (2) while acting on screw rod (1), and pass
Power part (8) has certain gap between the position of the first nut (7) and the first nut (7).First by the second spiral shell during installation
Female (6), the first nut (7) are tightened on screw rod (1), and the first nut (7) contacts with the second nut (6), can play locking
Effect；Secondly the 3rd nut (2) is acted on force transferring part (8) by screw rod (1)；Finally screw rod is held with hydraulic elongator
(1) upper end, move screw rod (1) to predetermined amount of tension, the 3rd nut (2) is tightened on screw rod (1) again, makes it tightly
Act on force transferring part (8).
Operation principle
Conventional Hydropower Unit installing structure of top cover figure as shown in figure 1, Hydropower Unit due in different heads, different works
When being run under the conditions of condition, the range of operation of unit on-load are big, screw rod (1) is in very big pressure all the time with the 3rd nut (2)
Under effect, simultaneously because start and stop is frequent, and is often under non-optimal operating condition and runs, cause screw rod (1) and the 3rd nut
(2) stress level on has fluctuation by a relatively large margin, under high stress level and frequently alternate stress effect, screw rod (1)
The probability wriggled with the 3rd nut (2) will be significantly increased, and screw rod (1) with the 3rd nut (2) once wriggle, push up
Effective mechanical connection will be lost between lid (3) and seat ring (4), produces axial displacement, so that the sealing of sealing strip (5) is made
With failure, press water is set to pour in down a chimney into factory building, so as to injure the safety of unit or even whole power plant.In order to solve above-mentioned ask
Topic, has invented a kind of dual safety protector of Hydropower Unit top cover bindiny mechanism, structure as shown in Figure 2, in the 3rd spiral shell
Increase a force transferring part (8), the first nut (7) and the second nut between female (2) and top cover (3) and on each screw rod (1)
(6), and with the 3rd nut (2) while acting on screw rod (1), and force transferring part (8) is close to the position of the first nut (7) and the
One nut has certain gap between (7), and now the first nut (7) is in tightening state with the second nut (6)；When unit is normal
During work, the pressure of press water is acted on force transferring part (8), due on screw rod (1), the 3rd nut (2) and force transferring part (8)
Mechanically contact, effective mechanically contact between top cover (3) and seat ring (4) is ensure that, so as to ensure sealing strip (5) sealing function；
When the nut (2) of screw rod (1) the 3rd produces wriggling, its stress is reduced, and screw rod (1) elastic deformation is gradually recovered, the second nut (6)
Fall and gradually contacted with seat ring (4) therewith, the second nut (6) gradually bears load, fundamentally ensures that Hydropower Unit will not
When wriggling because pressure luffing is excessive because of screw rod (1) and the 3rd nut (2), cause to lose between top cover (3) and seat ring (4)
Effective mechanically contact, and then ensure that the sealing function of sealing strip (5) is still effective, so as to play protection unit safety effect.
Brief description of the drawings
Fig. 1：Conventional Hydropower Unit installing structure of top cover figure
Fig. 2：A kind of dual safety protector figure of Hydropower Unit top cover bindiny mechanism disclosed by the invention
Embodiment
As shown in Figure 1 and Figure 2, a kind of dual safety protector of Hydropower Unit top cover bindiny mechanism, in the 3rd nut 2
Increase a force transferring part 8, the first nut 7 and the second nut 6 between top cover 3 and on each screw rod 1, and with the 3rd nut 2
Act on simultaneously on screw rod 1, and force transferring part 8 has certain gap between the position of the first nut 7 and the first nut 7,
First the second nut 6, the first nut 7 are tightened on screw rod 1 during installation, and the first nut 7 contacts with the second nut 6, can rise
To anti-loose effect；Secondly the 3rd nut 2 is acted on force transferring part 8 by screw rod 1；Finally screw rod is held with hydraulic elongator
1 upper end to, screw rod 1 is moved to predetermined amount of tension, the 3rd nut 2 is tightened on screw rod 1 again, it is tightly acted on biography
On power part 8, after the completion of unclamp hydraulic elongator, the 3rd nut 2 and force transferring part 8 are in close contact, are always maintained at screw rod 1
Tension elongation state, top cover 3 disengage with the second nut 6, and now the 3rd nut 2 bears load, and the second nut 6 does not stress.
When unit normal work, the pressure of press water is acted on force transferring part 8, due to screw rod 1, the 3rd nut 2 and force transferring part 8
Upper mechanically contact, effective mechanically contact between top cover 3 and seat ring 4 is ensure that, limits the axial movement of top cover 3, so as to protect
Demonstrate,prove the sealing function of sealing strip 5；When the nut 2 of screw rod 1 and the 3rd produces wriggling, its stress is reduced, and the elastic deformation of screw rod 1 is gradually extensive
Multiple, the second nut 6 falls and gradually contacted with seat ring 4 therewith, and now, the second nut 6 gradually bears load, so as to ensure that top
Effective mechanically contact between lid 3 and seat ring 4, ensure that sealing strip 5 can continue to play sealing function, play protection unit safety
Effect.
Claims (1)
1. a kind of dual safety protector of Hydropower Unit top cover bindiny mechanism, it is characterized in that：In the 3rd nut (2) and top cover
(3) increase a force transferring part (8), the first nut (7) and the second nut (6) between and on each screw rod (1), and with the 3rd spiral shell
Female (2) while act on screw rod (1), and force transferring part (8) is between the position of the first nut (7) and the first nut (7)
There is certain gap, first the second nut (6), the first nut (7) are tightened on screw rod (1) during installation, and the first nut (7)
Contacted with the second nut (6), anti-loose effect can be played；Secondly the 3rd nut (2) is acted on into force transferring part by screw rod (1)
(8) on；Screw rod (1) upper end finally is held with hydraulic elongator, screw rod (1) is moved to predetermined amount of tension, again by the 3rd spiral shell
Female (2) are tightened on screw rod (1), it is tightly acted on force transferring part (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711016867.6A CN107816481A (en) | 2017-10-26 | 2017-10-26 | A kind of dual safety protector of Hydropower Unit top cover bindiny mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711016867.6A CN107816481A (en) | 2017-10-26 | 2017-10-26 | A kind of dual safety protector of Hydropower Unit top cover bindiny mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107816481A true CN107816481A (en) | 2018-03-20 |
Family
ID=61603233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711016867.6A Pending CN107816481A (en) | 2017-10-26 | 2017-10-26 | A kind of dual safety protector of Hydropower Unit top cover bindiny mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107816481A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030185642A1 (en) * | 2002-03-26 | 2003-10-02 | Akira Imai | Load transfer apparatus |
| CN105020237A (en) * | 2014-04-29 | 2015-11-04 | 成都九龙柜业有限公司 | Device capable of preventing nut from loosening |
| CN205446343U (en) * | 2016-03-16 | 2016-08-10 | 江苏中高煤矿机械有限公司 | Big pretightning force machinery jackscrew formula lock nut |
| CN205533664U (en) * | 2016-01-12 | 2016-08-31 | 厦门理工学院 | Double thread bolt |
| CN106640902A (en) * | 2016-12-06 | 2017-05-10 | 山东天盾矿用设备有限公司 | Positive and negative locking bolt |
-
2017
- 2017-10-26 CN CN201711016867.6A patent/CN107816481A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030185642A1 (en) * | 2002-03-26 | 2003-10-02 | Akira Imai | Load transfer apparatus |
| CN105020237A (en) * | 2014-04-29 | 2015-11-04 | 成都九龙柜业有限公司 | Device capable of preventing nut from loosening |
| CN205533664U (en) * | 2016-01-12 | 2016-08-31 | 厦门理工学院 | Double thread bolt |
| CN205446343U (en) * | 2016-03-16 | 2016-08-10 | 江苏中高煤矿机械有限公司 | Big pretightning force machinery jackscrew formula lock nut |
| CN106640902A (en) * | 2016-12-06 | 2017-05-10 | 山东天盾矿用设备有限公司 | Positive and negative locking bolt |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180320 |