CN103498856A - Damping device of bolt fastener on surface of high-speed rotor - Google Patents
Damping device of bolt fastener on surface of high-speed rotor Download PDFInfo
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- CN103498856A CN103498856A CN201310408009.1A CN201310408009A CN103498856A CN 103498856 A CN103498856 A CN 103498856A CN 201310408009 A CN201310408009 A CN 201310408009A CN 103498856 A CN103498856 A CN 103498856A
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- bolt fastener
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- locked spacer
- outer cover
- damping device
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Abstract
The invention discloses a damping device of a bolt fastener on the surface of a high-speed rotor, and belongs to the technical field of high-speed rotating machines. The damping device comprises a damping outer cover, a special-shaped retainer mat and a fixing screw, wherein the special-shaped retainer mat is fixed to the surface of a to-be-fastened workpiece through the bolt fastener. After the bolt fastener is pre-tightened, a stopping tongue piece of the special-shaped retainer mat is bent, so that the stopping tongue piece tightly presses against the side face of the head of the bolt, and stopping and anti-loosening functions are achieved. Then the damping outer cover is buckled over the head of the bolt and the special-shaped retainer mat, the lower edge of the damping outer cover is flush with the surface of the to-be-fastened workpiece, the inner side face of the damping outer cover is attached to the outer profile of the special-shaped retainer mat, and ultimately, the damping outer shell and the special-shaped retainer mat are connected through a fixing bolt of the damping outer shell. The damping device effectively reduces flow resistance caused by a protruding portion of the bolt fastener of a high-speed rotating part in a work state, is good in damping effect and guarantees that the bolt fastener can reliably work on the high-speed rotor.
Description
Technical field
The invention belongs to the high-speed rotating machine field, relate to a kind of device that reduces high speed rotor parts surface fastening piece resistance.
Background technique
In modern aeroengine or other dynamic power machines, all comprise the high speed rotor parts, the bolt fastener projection on lower these high speed rotor surfaces can produce pressure drag with the fluid effect in high-speed motion in working order.These resistances cause the loss of machine of torque of high speed rotor dish, cause the loss of energy, higher at rotating speed, particularly evident when fluid viscosity is larger.The dither of while high-speed rotating component etc. can cause bolt fastener loosening, for fear of such situation, occur, corresponding stop locking device need to be set at the screw bolt and nut place, in the bolt installation process, also need to install the impacting force that pad disperses bolt fastener.
Summary of the invention
For meeting drag reduction and the locking requirement of existing high speed rotor bolt fastener, the present invention utilizes the fluid mechanics correlative principle to propose a kind of novel high speed rotor surface bolt fastener drag reduction scheme and designed related device, described device can be under the prerequisite that greatly reduces bolt fastener projection pressure drag, take into account the effect of check washer, guarantee that bolt fastener can reliably working under high rotating speed.Its Applicable scope is bolt fastener axis and the approximately parallel occasion of fastener (as rotating disk) spin axis.
Its cardinal principle is at the outside design of bolt fastener one water-drop-shaped drag reduction outer cover, bolt fastener (or nut) is coated wherein, the profile of described drag reduction outer cover is the cylinder that a water-drop-shaped stretches and forms along fastener surface normal direction, blunt nosed end (arc end) is leading edge windward, the tip end is leeward trailing edge, such profile can weaken the fluid form drag due to bolt fastener convex portion six prism profiles greatly, especially in high-speed motion, the leeward zone of bolt fastener is because the circulation area sudden expansion causes the fluid vigorous reflux, produce the low pressure recirculating zone, there is obvious pressure difference before and after making bolt fastener, form larger pressure drag.And the transition on this drag reduction outer cover leading edge arc end surface is comparatively smooth-going, trailing edge gradually closing design effectively weakens the formation of low pressure recirculating zone, has fundamentally reduced pressure drag.
Damping device involved in the present invention is divided into drag reduction outer cover, special-shaped locked spacer and set screw three parts, wherein special-shaped locked spacer is installed between fastened workpiece (as rotating disk) and bolt fastener (as bolt), by bolt fastener, is fixed on fastened workpiece surface.The positioning convex of the lower surface of abnormity locked spacer is installed in the positioning hole of accomplishing fluently in advance on fastened workpiece, limits special-shaped locked spacer with this and rotates along the bolt fastener axis.After bolt fastener (as bolt) pretension, a certain stop tongue piece according to the angle folding of bolt head abnormity locked spacer, make stop tongue piece and bolt head lateral surface compressing, plays the locking effect of stop; The drag reduction outer cover is fastened on bolt head and special-shaped locked spacer, the lower limb of drag reduction outer cover is concordant with fastened workpiece surface again, the external frame laminating of inner lateral surfaces and special-shaped locked spacer; Finally use drag reduction outer cover set screw to connect fastening drag reduction outer cover and special-shaped locked spacer.When damping device, during at High Rotation Speed, the suffered inertial centrifugal force of drag reduction outer cover passes to special-shaped locked spacer by inner lateral surfaces, then passes to fastened workpiece.Drag reduction outer cover set screw is not subject to the effect of shearing stress, has guaranteed the reliability of drag reduction outer cover in the high speed rotating.
The invention has the advantages that:
(1) the present invention effectively reduces the flow resistance that high-speed rotating component bolt fastener projection is produced down in working order, and drag-reduction effect is good.
(2) the present invention has taken into account the effect of locked spacer, has played the locking effect of stop when effectively disperseing the bolt fastener pretightening force, has guaranteed the reliably working of bolt fastener on high speed rotor.
(3) damping device the present invention relates to has rational power transmission route, can effectively be delivered to fastened workpiece because of the inertial centrifugal force that High Rotation Speed produces, and drag reduction outer cover set screw tension stress and be not subject to shearing stress only.
The accompanying drawing explanation
The assembly method schematic diagram that Fig. 1 is high speed rotor provided by the invention surface bolt fastener damping device.
The project organization schematic diagram that Fig. 2 is high speed rotor provided by the invention surface bolt fastener damping device abnormity locked spacer upper surface and lower surface.
The design sketch that Fig. 3 is high speed rotor provided by the invention surface bolt fastener damping device drag reduction cover part.
The assembling design sketch that Fig. 4 is high speed rotor provided by the invention surface bolt fastener damping device abnormity locked spacer.
Fig. 5 is the design sketch after the bolt fastener damping device assembling of high speed rotor provided by the invention surface.
In figure:
1. positioning hole; 2. set screw; 3. drag reduction outer cover;
4. bolt fastener; 5. special-shaped locked spacer; 6. positioning convex;
7. tapped hole; 8. stop tongue piece; 9. through hole.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Referring to Fig. 1～Fig. 5, the invention provides a kind of novel high speed rotor surface bolt fastener damping device, described damping device comprises set screw 2, drag reduction outer cover 3 and special-shaped locked spacer 5.Described drag reduction outer cover 3 and special-shaped locked spacer 5 have identical water droplet construction profile, be processed with in advance the positioning hole 1 of special-shaped locked spacer 5 on fastened workpiece (as rotating disk), positioning hole 1 is with bolt fastener 4 in same radial position, and the direction that bolt fastener 4 points to positioning holes 1 tangential velocity direction when rotating is identical.Bolt fastener 4 penetrates in the mounting hole of fastened workpiece through after the macropore 501 of special-shaped locked spacer 5, is threaded fastening.Now the positioning convex 6 of special-shaped locked spacer 5 penetrates in the positioning hole 1 of fastened workpiece, and the lower surface of special-shaped locked spacer 5 fits tightly the surface in fastened workpiece.Lock bolt fastening piece 4 and by special-shaped locked spacer 5, be fixed on fastened workpiece after, select stop tongue piece 8 of the blunt nosed end of special-shaped locked spacer 5 to be bent upwards 90 degree, make the side of described stop tongue piece 8 laminating bolt fasteners 4, as Fig. 4, make it play locking stopping function.On special-shaped locked spacer 5, drag reduction outer cover 3 is set, the bottom surface of drag reduction outer cover 3 is concordant with the surface of fastened workpiece, and the laminating of the outer rim of the inwall of drag reduction outer cover 3 and special-shaped locked spacer 5.Set screw 2 is installed with through hole 9 through the set screw on drag reduction outer cover 3, is fixed in tapped hole 7 locking on special-shaped locked spacer 5.Complete the assembling of described high speed rotor surface bolt fastener damping device.
As shown in Figure 2, special-shaped locked spacer 5 is the water-drop-shaped slab construction, has macropore 501 in the middle of arc section, and macropore 501 slightly larger in diameter are in the external diameter of bolt fastener 4, for passing through bolt fastener 4.The arc section slightly larger in diameter of water-drop-shaped slab construction is in the head diameter of bolt fastener 4, as shown in Figure 4.Abnormity locked spacer 5 upper surfaces are provided with tapped hole 7, because special-shaped locked spacer 5 is slab construction, therefore described tapped hole 7 protrudes from the upper surface of special-shaped locked spacer 5, the height of tapped hole 7 should be left the spatial placement through hole 9 that drag reduction outer cover 3 is suitable for, after making set screw 2 lockings, the upper surface of tapped hole 7 does not contact with the lower surface of through hole 9, and the upper surface of set screw 2 is concordant with the upper surface of drag reduction outer cover 3 simultaneously.Described special-shaped locked spacer 5 lower surfaces are provided with 1 positioning convex 6, be arranged on the axis of symmetry of special-shaped locked spacer 5, approximate the external diameter of 1～1.5 times of positioning convex 6 with the gap length of special-shaped locked spacer 5 macropores 501, have Spielpassung between positioning convex 6 and positioning hole 1 simultaneously.Arc section at described special-shaped locked spacer 5 is provided with a plurality of stop tongue pieces 8, stop tongue piece 8 is integrated machine shaping with special-shaped locked spacer 5, and the outer end of stop tongue piece 8 protrudes from arc section, and, when described stop tongue piece 8 is bent upwards 90 degree, highly be not less than half of bolt fastener 4 height of heads.When adopting three stop tongue pieces, preferably the angle intervals of every two stop tongue pieces is set to 30 degree, and a middle stop tongue piece 8 is surface curvature to 90 degree upwards.
As shown in Figure 3, described drag reduction outer cover 3 is the water-drop-shaped shell mechanism, the cylindrical shell formed along the stretching of fastener surface normal direction by the water droplet shape, arc section at described housing opening place is provided with breach 301, breach 301 width can cover whole stop tongue pieces 8, and breach 301 highly is slightly larger than the thickness of special-shaped locked spacer 5, after the correct installation of device, the stop tongue piece 8 be not bent upwards can expose by breach, and 8 of the stop tongue pieces be bent upwards are coated by drag reduction outer cover 3.Be provided with through hole 9 on drag reduction outer cover 3, for being connected and fixed screw 2, through hole 9 is step hole, can meet set screw 2 screw end is sunk to wherein, and the end of screw 2 and the flush of drag reduction outer cover 3 after installing, as Fig. 5.
A kind of novel high speed rotor surface bolt fastener damping device that the embodiment of the present invention provides, utilize the fluid mechanics correlative principle that the fluid resistance of the bolt fastener on high speed rotor surface is reduced effectively, reduced the loss of resistance to moment of torsion, take into account the effect of bolt fastener locked spacer simultaneously, guaranteed the safe and reliable operation of high-speed rotating component.The apparatus structure the present invention relates to is simple, easy for installation, and Applicable scope is wider.
This water-drop-shaped shell drag-reduction effect is checking by experiment, and verification method is to measure windage moment of torsion that rotating disk that bolt fastener and damping device have been installed produces under same rotating speed its size relatively, can obtain the drag-reduction effect of drag reduction outer cover.Adopt the hexagonal projection simulation bolt that circumscribed circle diameter is 13mm in experiment, the employing arc diameter is 13mm, the water-drop-shaped projection simulation drag reduction outer cover that length is 26mm, two kinds of heights of projection are 11mm, circumferentially be evenly arranged 18 projections during torque measurement on rotating disk, the turning radius of mounting point is 200mm, and working speed is 5000 rev/mins and 7000 rev/mins, wherein the hexagonal projection be divided into seamed edge windward with plane two kinds of mounting types windward, the water-drop-shaped projection is blunt nosedly to install windward.Measure by experiment the moment of torsion that flow resistance produces rotating disk, this moment of torsion is divided by protruding number and radius is installed, obtain the suffered resistance of each projection, with this, calculate the comparative resistance percentage of this kind of projection with respect to the projection of flow resistance maximum, the i.e. drag-reduction effect of this kind of projection.Under the different rotating speeds obtained through experimental calculation, the drag-reduction effect of water-drop-shaped projection is as table 1:
The drag-reduction effect of a few class projections in table 1 experiment measuring
By in table 1, visible water-drop-shaped projection is under identical working speed, flow resistance is less than 50% of hexagonal projection, so the present invention adopts the drag reduction scheme that increases bolt water-drop-shaped outer cover to have good drag-reduction effect.
Below by reference to the accompanying drawings the specific embodiment of the present invention is described; but these explanations can not be understood to limit scope of the present invention; protection scope of the present invention is limited by the claims of enclosing, and any change on the claims in the present invention basis is all protection scope of the present invention.
Claims (8)
1. high speed rotor surface bolt fastener damping device, it is characterized in that: described damping device comprises drag reduction outer cover, special-shaped locked spacer and set screw three parts, wherein special-shaped locked spacer is installed between fastened workpiece and bolt fastener, by bolt fastener, is fixed on fastened workpiece surface; The drag reduction outer cover is fastened on bolt fastener head and special-shaped locked spacer, and the lower limb of drag reduction outer cover is concordant with fastened workpiece surface, the external frame laminating of inner lateral surfaces and special-shaped locked spacer; Described special-shaped locked spacer is the water-drop-shaped slab construction; Described drag reduction outer cover is the water-drop-shaped shell construction.
2. a kind of high speed rotor according to claim 1 surface bolt fastener damping device, it is characterized in that: have macropore in the middle of the arc section of described special-shaped locked spacer, large bore dia is greater than the major diameter of thread of bolt fastener; The arc section diameter of water-drop-shaped slab construction is greater than the head diameter of bolt fastener, and special-shaped locked spacer upper surface is provided with tapped hole, and lower surface is provided with positioning convex, at the arc section of described special-shaped locked spacer, is provided with the stop tongue piece.
3. a kind of high speed rotor according to claim 2 surface bolt fastener damping device, it is characterized in that: described tapped hole protrudes from the upper surface of special-shaped locked spacer.
4. a kind of high speed rotor according to claim 2 surface bolt fastener damping device, it is characterized in that: described positioning convex is arranged on the axis of symmetry of special-shaped locked spacer, equal the external diameter of 1～1.5 times of positioning convex, Spielpassung between positioning convex and positioning hole with the gap length of special-shaped locked spacer macropore; Positioning hole and bolt fastener be in same radial position, and the direction that bolt fastener points to positioning hole tangential velocity direction when rotating is identical.
5. a kind of high speed rotor according to claim 2 surface bolt fastener damping device, it is characterized in that: described stop tongue piece and special-shaped locked spacer are integrated machine shaping, and the outer end of stop tongue piece protrudes from arc section, and, when described stop tongue piece is bent upwards 90 degree, highly be not less than half of bolt fastener height of head.
6. a kind of high speed rotor according to claim 2 surface bolt fastener damping device, it is characterized in that: described stop tongue piece arranges three, and the angle intervals of every two stop tongue pieces is 30 degree.
7. a kind of high speed rotor according to claim 1 surface bolt fastener damping device, it is characterized in that: the arc section of described drag reduction housing case opening is provided with breach, gap width can cover whole stop tongue pieces, cut height is greater than the thickness of special-shaped locked spacer, after the correct installation of device, the stop tongue piece be not bent upwards can expose by breach, and the stop tongue piece be bent upwards is coated by the drag reduction outer cover; Be provided with through hole on the drag reduction outer cover, for being connected and fixed screw.
8. a kind of high speed rotor according to claim 7 surface bolt fastener damping device, it is characterized in that: described through hole is step hole, can meet set screw screw head is sunk to wherein, the end of screw and the flush of drag reduction outer cover after installing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408009.1A CN103498856B (en) | 2013-09-10 | 2013-09-10 | A kind of high speed rotor surface bolt fastener damping device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408009.1A CN103498856B (en) | 2013-09-10 | 2013-09-10 | A kind of high speed rotor surface bolt fastener damping device |
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| CN103498856A true CN103498856A (en) | 2014-01-08 |
| CN103498856B CN103498856B (en) | 2015-08-05 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105683638A (en) * | 2013-10-28 | 2016-06-15 | 奥尔科阀集团有限责任公司 | Retainer device |
| JP2017516946A (en) * | 2014-06-03 | 2017-06-22 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Turbocharger with electric machine |
| CN107743547A (en) * | 2015-06-22 | 2018-02-27 | 大陆汽车有限公司 | Component for internal combustion engine |
| CN109299500A (en) * | 2018-08-09 | 2019-02-01 | 中国航发沈阳发动机研究所 | Aero-engine high speed rotation valve snail bolt drag reduction design method and rotating disk |
| CN109779644A (en) * | 2019-01-28 | 2019-05-21 | 上海隧道工程有限公司 | The fixed stopping device of shield machine roller cutter and its method for rapidly mounting |
| CN110374593A (en) * | 2019-08-29 | 2019-10-25 | 三一重型装备有限公司 | Development machine internal spraying water supply system and development machine |
| CN111981008A (en) * | 2020-07-10 | 2020-11-24 | 中广核核电运营有限公司 | Locking device of locking plate |
| US11047418B2 (en) | 2018-02-21 | 2021-06-29 | Airbus Operations Limited | Fastener locking |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105683638A (en) * | 2013-10-28 | 2016-06-15 | 奥尔科阀集团有限责任公司 | Retainer device |
| JP2017516946A (en) * | 2014-06-03 | 2017-06-22 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Turbocharger with electric machine |
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| CN107743547A (en) * | 2015-06-22 | 2018-02-27 | 大陆汽车有限公司 | Component for internal combustion engine |
| US11047418B2 (en) | 2018-02-21 | 2021-06-29 | Airbus Operations Limited | Fastener locking |
| CN109299500A (en) * | 2018-08-09 | 2019-02-01 | 中国航发沈阳发动机研究所 | Aero-engine high speed rotation valve snail bolt drag reduction design method and rotating disk |
| CN109779644A (en) * | 2019-01-28 | 2019-05-21 | 上海隧道工程有限公司 | The fixed stopping device of shield machine roller cutter and its method for rapidly mounting |
| CN110374593A (en) * | 2019-08-29 | 2019-10-25 | 三一重型装备有限公司 | Development machine internal spraying water supply system and development machine |
| CN111981008A (en) * | 2020-07-10 | 2020-11-24 | 中广核核电运营有限公司 | Locking device of locking plate |
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| CN103498856B (en) | 2015-08-05 |
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