CN205001336U - Intersection of type compensation bolt - Google Patents
Intersection of type compensation bolt Download PDFInfo
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- CN205001336U CN205001336U CN201520307912.3U CN201520307912U CN205001336U CN 205001336 U CN205001336 U CN 205001336U CN 201520307912 U CN201520307912 U CN 201520307912U CN 205001336 U CN205001336 U CN 205001336U
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Abstract
The utility model relates to an intersection of type compensation bolt belongs to the fastener field. Its characterized in that: the screw thread of intersection of type compensation bolt's intersection of type screw rod (1) is at the both ends head, and the diameter ratio bottom diameter of pole is smaller, and the double threaded screw is intersection of type structure, penetrates work piece (A), work piece (B), sheathes diplopore packing ring (2) in, screws up nut (3) according to the pretightning force of setting for, and (F1) pretightning force of applying is axial just not only, simultaneously in addition normal direction, radial three direction with work piece (A), work piece (B) locking. As work piece (A), work piece (B) pressurized, when receiving the inflation, (F2) the working force that produces is attached on the straightway and ARC segments of intersection of type screw rod (1), ARC segments swashs hot during operation in the quench, either large or small change can take place for the radian, a new compensation volume has been add in the change of this kind of radian, (f3) the normal direction that produces, (F2, ) radial prestressing force, and (f1) axial force of straightway, receiving on an equal basis under the prestressing force condition, it is big to have satisfied pressure differential, the difference in temperature is big, work piece (A) under the cold and hot reversal operating mode, the not not hard up requirement of work piece (B).
Description
Technical field
The present invention relates to a kind of ∩ type and compensate bolt, belong to fastener areas.
Background technique
In many machinery, screw bears expansion load, namely machinery some parts or workpiece pressurized, be heated, and pressure or temperature also constantly change, the power that their stressing conditions of pressure reduction, the temperature difference, alternating hot and cold makes screw bear, rise to a peak once, once drop to again.
The compensation bolt of prior art, normally adopts the nose balance in a direction, and the structure compensating bolt and plain bolt is similar, just its bar is relatively long, and the diameter of bar is smaller than minor diameter of thread, in an unstressed condition, bolt has normal length, and workpiece is in normal thickness.Carry out detailed calculating by needing during prestressing force, the power calculated strained by bolt with determining moment of torsion wrench, bolt extends vertically.Meanwhile, workpiece is compacted thinning, and at this moment bolt is by axial prestress.When pressurized, there is working force that is very large and that increase suddenly by heated work pieces time, working force adjection is on bolt, bolt extends further, and at this moment prestressing force is reduced to residual stress, the residual stress of reduction must be on the occasion of, on the occasion of not loosening even as big as holding workpiece, such as engine cylinder cover, steam turbine upper and lower enclosure, connecting rod bearing, such operating mode, uses axially single compensation bolt can meet the requirement of lock sealing.
But it is large for pressurized, heating temperature is high especially, alternating hot and cold pressure reduction, the operating mode that the temperature difference is large, such as, sintering machine-sintering pallet breast board, hot chain mat machine-gillis and chain, hot hopper-type carries machine-hopper and chain etc., use single nose balance bolt can not meet the requirement of locking, its reason one is that workpiece heating temperature is high especially, swell increment is large, the working force adjection produced surges on bolt, two is that workpiece temperature is fallen suddenly, contour projector is very large, bolt and workpiece can not be synchronous contraction, the alternating hot and cold operating mode that this temperature difference is large, working force is deducted to the prestressing force that bolt sets in advance, remaining residual-stress value is negative value, bolt is made to lose fastening effect, workpiece is caused to loosen.Such as, sintering pallet breast board loosens, and produces serious leaking out, and the gillis of hot hopper type hoister, hot this kind equipment of chain mat machine, hopper loosen, and can occur stuck as fastening not in time, the accident such as come off.Resembling such operating mode at present can only be diligent inspection, diligent fastening, does not have other effective ways to solve.
Summary of the invention
Object of the present invention is for overcoming the deficiencies in the prior art, a kind of locking compensation bolt of ∩ type double structure is provided, compensation direction has axis, normal direction, radial direction three, it has the large characteristic of compensation rate, particularly bolt can be met large in the temperature difference, expansion load is large, does not loosen under the operating modes such as alternating hot and cold.
The object of the invention is to be achieved through the following technical solutions, a kind of ∩ type compensates bolt, and it comprises: ∩ type screw rod, diplopore packing ring, the compositions such as nut.
A kind of ∩ type provided by the invention compensates bolt, and ∩ type screw flight is in two ends, and the diameter of bar is smaller than minor diameter of thread, and double threaded screw structure is ∩ type, penetrates workpiece, puts diplopore packing ring, by the pretightening force fastening nut of setting.When workpiece pressurized, by on the working force straightway that is attached to ∩ type screw rod produced when expanding and arc, there is the power in three directions respectively, radian can great changes will take place when chilling and shock heating works for arc, a kind of new compensation rate has been set up in the change of this radian, the normal direction, the radial force that produce, add the axial force of straightway, compensation rate is greater than prior art.
A kind of ∩ type provided by the invention compensates the diplopore packing ring of bolt, and the pitch-row of setting compensates in bolt compensation process in ∩ type, and ∩ type screw rod can be kept opposing parallel.
A kind of ∩ type provided by the invention compensates bolt and is achieved in that in an unstressed condition, and ∩ type compensates bolt two straightway and has normal length, and the radian of arc is constant, and workpiece is in normal thickness.
By prestressing force through detailed calculating, ∩ type is compensated bolt tension with determining moment of torsion wrench by the power calculated, and two straightway screw rods extend vertically, and the radian of arc diminishes.Meanwhile, workpiece is compacted thinning, and at this moment ∩ type compensates bolt two straightway screw rod by axial prestress, changes the arc of radian by prestressing force that is radial, normal direction both direction.
When pressurized, there is working force that is very large and that increase suddenly by heated work pieces time, working force adjection compensates on bolt in ∩ type, and two straightway screw rods extend further, and the radian of arc diminishes further, at this moment arc distortion adds the prestressing force sum of applying, is reduced to residual stress.Reduce residual stress be on the occasion of, on the occasion of not loosening even as big as holding workpiece.
Work as pressure drop, temperature reduces, the thickness of workpiece is corresponding thinning, at this moment ∩ type compensates bolt, the radian of arc changes from small to big, the prestressing force of radial direction, normal direction both direction, and helping two straightway screw rods to maintain axial prestress is not negative value, remaining residual stress be equally on the occasion of, on the occasion of not loosening even as big as holding workpiece.When repetition pressurized, be heated, when working force that is very large and that increase suddenly appears again in workpiece, working force adjection compensates on bolt at ∩ ... so iterative cycles, holding workpiece does not loosen.
Compared with the prior art: equal by prestressing force situation, compensate total amount and be greater than prior art, compensation direction, by single axis, has set up again normal direction, radial direction totally three directions, can meet that pressure reduction is large, the temperature difference is large, workpiece under alternating hot and cold operating mode connects tight requirement.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments mode, the present invention is further detailed explanation.
Wherein:
Fig. 1 is that ∩ type compensates the unstressed schematic diagram of bolt
Fig. 2 is that ∩ type compensates bolt by prestressing force schematic diagram
Fig. 3 is that ∩ type compensates bolt high temperature or high pressure bears load schematic diagram
Fig. 4 is that ∩ type compensates bolt temperature drop or pressure drop load schematic diagram
In figure, the radial prestressing force of 1 ∩ type screw rod, 2 diplopore packing rings, 3 nuts, A workpiece, B workpiece, F1 prestressing force, F2 working force, F3 working force, f1 axial prestress, f2 normal direction prestressing force, f3.
Embodiment
Further illustrate the present invention in conjunction with the accompanying drawings and embodiments, the present invention is if Fig. 1 is for shown in the unstressed schematic diagram of ∩ type compensation bolt, it is characterized in that: the screw thread of ∩ type screw rod (1) is in two ends, the diameter of bar is smaller than minor diameter of thread, the structure of double threaded screw is ∩ type, penetrates workpiece (A), workpiece (B), put diplopore packing ring (2), nutting (3).In unstressed situation, ∩ type compensates bolt two straightway and has normal length, and the radian of arc is constant, workpiece (A), and workpiece (B) is in normal thickness.
The present invention such as Fig. 2 is subject to shown in prestressing force schematic diagram for ∩ type compensates bolt, it is characterized in that: (F1) prestressing force is through the calculating of detail, ∩ type is compensated bolt tension with determining moment of torsion wrench by the power calculated, two straightway screw rods of ∩ type screw rod (1) extend vertically, and the radian of arc diminishes.Meanwhile, workpiece (A), workpiece (B) is compacted thinning, and at this moment ∩ type compensates bolt two straightway screw rod by (f1) axial prestress, the arc of radian of diminishing is radial by (f3), the prestressing force of (f2) normal direction both direction.
The present invention such as Fig. 3 bears shown in load schematic diagram for ∩ type compensates bolt high temperature or high pressure, it is characterized in that: when pressurized, by heated work pieces (A), when there is (F2) working force that is very large and that increase suddenly in workpiece (B), (F2) working force adjection compensates on bolt in ∩ type, two straightway screw rods of ∩ type screw rod (1) extend further, the radian of arc diminishes further, at this moment arc distortion adds the prestressing force sum of applying, is reduced to residual stress.Reduce residual stress be on the occasion of, on the occasion of not loosening even as big as holding workpiece.
The present invention such as Fig. 4 is that ∩ type compensates bolt temperature drop or pressure drop load schematic diagram, it is characterized in that: work as pressure drop, temperature reduces, workpiece (A), workpiece (B) is got back to normal thickness or is greater than normal thickness, at this moment ∩ type compensates (F3) working force of bolt, the radian of arc changes from small to big, (f3) radial, (f2) prestressing force of normal direction both direction, help two straightway screw rods to maintain (f1) axial prestress for negative value, remaining residual stress be equally on the occasion of, on the occasion of not loosening even as big as holding workpiece.When repeating pressurized, when there is again very large and that increase suddenly working force (F2) by heated work pieces, working force adjection compensates on bolt in ∩ type .... so iterative cycles.
The present invention is if Fig. 1 is as Fig. 1, and as Fig. 2, ∩ type as a kind of in Fig. 3, Fig. 4 compensates shown in bolt, and it is characterized in that: the diplopore packing ring (2) of described locking, the pitch-row of setting, in compensation process, can keep ∩ type screw rod opposing parallel.
Claims (2)
1. a ∩ type compensates bolt, by ∩ type screw rod (1), diplopore packing ring (2), nut (3) forms, it is characterized in that: the screw thread of ∩ type screw rod (1) is in two ends, the diameter of bar is smaller than minor diameter of thread, double threaded screw is ∩ type structure, penetrate workpiece (A), workpiece (B), put diplopore packing ring (2), by (F1) pretightening force fastening nut (3) of setting, the pretightening force applied has (f1) axially, (f2) radial, normal direction (f3) three directions are by workpiece (A), workpiece (B) is locked, when workpiece pressurized, by (F2) working force produced when expanding, on the straightway being attached to ∩ type screw rod (1) and arc, arc is when chilling and shock heating works, radian can great changes will take place, the new compensation rate that utilized the change of this radian to set up, (f2) normal direction produced, (f2) radial force adds (f1) axial prestress of straightway, equal by prestressing force situation, pressure reduction can be met large, the temperature difference is large, workpiece (A) under alternating hot and cold operating mode, workpiece (B) tight requirement.
2. a kind of ∩ type compensates bolt according to claim 1, and it is characterized in that: the diplopore packing ring (2) of described locking, the pitch-row of setting, in compensation process, can keep ∩ type screw rod opposing parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520307912.3U CN205001336U (en) | 2015-05-12 | 2015-05-12 | Intersection of type compensation bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520307912.3U CN205001336U (en) | 2015-05-12 | 2015-05-12 | Intersection of type compensation bolt |
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| Publication Number | Publication Date |
|---|---|
| CN205001336U true CN205001336U (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520307912.3U Active CN205001336U (en) | 2015-05-12 | 2015-05-12 | Intersection of type compensation bolt |
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| CN (1) | CN205001336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286542A (en) * | 2015-05-12 | 2017-01-04 | 无锡山宁机械有限公司 | A kind of ∩ type compensates bolt |
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2015
- 2015-05-12 CN CN201520307912.3U patent/CN205001336U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286542A (en) * | 2015-05-12 | 2017-01-04 | 无锡山宁机械有限公司 | A kind of ∩ type compensates bolt |
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