CN102514212A - Tool for eliminating thermal stress of circular viscoelastic damper and method for same - Google Patents
Tool for eliminating thermal stress of circular viscoelastic damper and method for same Download PDFInfo
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- CN102514212A CN102514212A CN2011104458000A CN201110445800A CN102514212A CN 102514212 A CN102514212 A CN 102514212A CN 2011104458000 A CN2011104458000 A CN 2011104458000A CN 201110445800 A CN201110445800 A CN 201110445800A CN 102514212 A CN102514212 A CN 102514212A
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- viscoelastic damper
- cylinder
- mold cylinder
- drum type
- type brake
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Abstract
The invention belongs to a mechanical design technology, and relates to a tool for eliminating thermal stress of a circular viscoelastic damper on a helicopter, and a method for eliminating tensile stress in rubber of the vulcanized damper by using the tool. The tool is an extruding cylinder [1], which comprises an inner die cylinder [11] and an outer die cylinder [12]; and the upper section of the outer die cylinder [12] is a guide section [120]. The method comprises the following steps of: arranging the circular viscoelastic damper [2] into the guide section [120] of the outer die cylinder; pressing the end face [24] of an outer cylinder [21] of the circular viscoelastic damper slowly into an extrusion section [121] of the outer die cylinder by using the inner die cylinder [11]; and pressing out of a squeeze-out section [122]. By the invention, a problem that tensile stress is generated in a rubber layer and between the rubber layer and the inner and outer cylinder walls because the rubber layer and the inner and outer cylinders have inconsistent heat expansion and cold contraction after the circular viscoelastic damper is vulcanized can be solved, and the service life of the damper can be prolonged.
Description
Technical field
The invention belongs to mechanical designing technique, relate to the drum type brake viscoelastic damper stress that is used on the helicopter and eliminate instrument and utilize this instrument to eliminate the method for the tensile stress in the rubber of damper sulfuration back.
Background technology
Lifting airscrew drum type brake viscoelastic damper is as shown in Figure 1; Mainly form by inner core a, urceolus b and therebetween high damping silicone rubber c; High damping silicone rubber c annotate to press injects between inner core a, the urceolus b through heat, through the baking moulding, and becomes an integral body through adhesive bonds.Because rubber expanded by heating in hot injection sulfurization forming process; After sulfuration is accomplished temperature to recover normal temperature, can produce and shrink; Cause rubber layer inside and glue-line and inner core, outer tube wall to produce very big internal stress; This internal stress is a tension, makes rubber crack or make the tack coat between rubber and inner core, the urceolus to tear easily, reduces the service life of damper.
Summary of the invention
The technical problem that the present invention will solve: provide a kind of drum type brake viscoelastic damper thermal stress to eliminate instrument and method, can eliminate the inner internal stress that produces of damper, prolong the physical life of damper.
Technical scheme of the present invention:
A kind of drum type brake viscoelastic damper thermal stress is eliminated instrument; This instrument is an extrusion cylinder 1; Said extrusion cylinder 1 comprises internal mold cylinder 11 and external mold cylinder 12, and external mold cylinder 12 epimeres are lead segment 120, and lead segment 120 internal diameter Φ 1 are greater than internal mold cylinder 11 external diameter Φ 3 and drum type brake viscoelastic damper 2 external diameter Φ 4; External mold cylinder 12 stage casings are extruded segment 121; The conical section that extruded segment 121 diminishes for internal diameter gradually, external mold cylinder hypomere is an extruding zone 122, extruding zone 122 internal diameter Φ 2 are greater than internal mold cylinder 11 external diameter Φ 3 and less than drum type brake viscoelastic damper 2 external diameter Φ 4.
A kind of to drum type brake viscoelastic damper thermal stress removing method; At first with the drum type brake viscoelastic damper 2 external mold cylinder lead segment 120 of packing into; Use internal mold cylinder 11 to push down urceolus 21 end faces 24 of drum type brake viscoelastic damper then; It slowly is pressed into external mold cylinder extruded segment 121, at last it is extruded from extruding zone 122.
Through being squeezed, the urceolus 21 of drum type brake viscoelastic damper after the sulfuration contracts; Make the urceolus 21 of drum type brake viscoelastic damper 2 produce plastic deformation; External diameter diminishes; Thereby make between glue-line inside and glue-line and inner core, the outer tube wall of drum type brake viscoelastic damper 2 and produce compression stress, reach the purpose of eliminating the tensile stress in the rubber of damper sulfuration back.
Beneficial effect of the present invention: can solve drum type brake viscoelastic damper sulfuration back because expanding with heat and contract with cold of glue-line and inner/outer tube is inconsistent; Produce tensile stress between glue-line inside and glue-line and inner core, the outer tube wall; And then the problem of the damper life-span that causes reduction; Squeeze between contract glue-line inside and glue-line and inner core, the outer tube wall through urceolus and to produce compression stress, suitably improve cartridge type viscoelastic damper service life.
Description of drawings
Fig. 1 is a lifting airscrew drum type brake viscoelastic damper sketch map;
Fig. 2 eliminates the tool construction sketch map for a kind of drum type brake viscoelastic damper of the present invention thermal stress;
Fig. 3 eliminates instrument user mode sketch map for a kind of drum type brake viscoelastic damper of the present invention thermal stress.
Wherein, 1-pushes urceolus, 2-drum type brake viscoelastic damper, 11-internal mold cylinder, 12-external mold cylinder, 120-lead segment, 121-extruded segment, 122-extruding zone, 21-urceolus, 24-end face.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail, see also Fig. 1 to Fig. 3.
As shown in Figure 1, the rubber layer inside of lifting airscrew drum type brake viscoelastic damper and glue-line and inner core, outer tube wall produce very big internal stress, and this internal stress is a tension, needs to eliminate this internal stress, avoids rubber to produce the crack, influences its service life.
As shown in Figure 2; A kind of drum type brake viscoelastic damper thermal stress is eliminated instrument, and this instrument is an extrusion cylinder 1, and said extrusion cylinder 1 comprises internal mold cylinder 11 and external mold cylinder 12; External mold cylinder 12 epimeres are lead segment 120; Lead segment 120 internal diameter Φ 1 are greater than internal mold cylinder 11 external diameter Φ 3 and drum type brake viscoelastic damper 2 external diameter Φ 4, and external mold cylinder 12 stage casings are extruded segment 121, the conical section that extruded segment 121 diminishes for internal diameter gradually; External mold cylinder hypomere is an extruding zone 122, and extruding zone 122 internal diameter Φ 2 are greater than internal mold cylinder 11 external diameter Φ 3 and less than drum type brake viscoelastic damper 2 external diameter Φ 4.
As shown in Figure 3; A kind of to drum type brake viscoelastic damper thermal stress removing method; At first with the drum type brake viscoelastic damper 2 external mold cylinder lead segment 120 of packing into; Use internal mold cylinder 11 to push down urceolus 21 end faces 24 of drum type brake viscoelastic damper then, it slowly is pressed into external mold cylinder extruded segment 121, at last it is extruded from extruding zone 122.
Through being squeezed, the urceolus 21 of drum type brake viscoelastic damper after the sulfuration contracts; Make the urceolus 21 of drum type brake viscoelastic damper 2 produce plastic deformation; External diameter diminishes; Thereby make between glue-line inside and glue-line and inner core, the outer tube wall of drum type brake viscoelastic damper 2 and produce compression stress, reach the purpose of eliminating the tensile stress in the rubber of damper sulfuration back.
Claims (2)
1. a drum type brake viscoelastic damper thermal stress is eliminated instrument; It is characterized in that this instrument is extrusion cylinder [1], said extrusion cylinder [1] comprises internal mold cylinder [11] and external mold cylinder [12]; External mold cylinder [12] epimere is lead segment [120]; Lead segment [120] internal diameter Φ 1 is greater than internal mold cylinder [11] external diameter Φ 3 and drum type brake viscoelastic damper [2] external diameter Φ 4, and external mold cylinder [12] stage casing is extruded segment [121], the conical section that extruded segment [121] diminishes for internal diameter gradually; External mold cylinder hypomere is extruding zone [122], and extruding zone [122] internal diameter Φ 2 is greater than internal mold cylinder [11] external diameter Φ 3 and less than drum type brake viscoelastic damper [2] external diameter Φ 4.
2. one kind is utilized claim 1 said instrument to drum type brake viscoelastic damper thermal stress removing method; It is characterized in that; At first with drum type brake viscoelastic damper [2] the external mold cylinder lead segment [120] of packing into; Use internal mold cylinder [11] to push down urceolus [21] end face [24] of drum type brake viscoelastic damper then, it slowly is pressed into external mold cylinder extruded segment [121], at last it is extruded from extruding zone [122].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104458000A CN102514212A (en) | 2011-12-22 | 2011-12-22 | Tool for eliminating thermal stress of circular viscoelastic damper and method for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104458000A CN102514212A (en) | 2011-12-22 | 2011-12-22 | Tool for eliminating thermal stress of circular viscoelastic damper and method for same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102514212A true CN102514212A (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104458000A Pending CN102514212A (en) | 2011-12-22 | 2011-12-22 | Tool for eliminating thermal stress of circular viscoelastic damper and method for same |
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| CN (1) | CN102514212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798788A (en) * | 2022-04-27 | 2022-07-29 | 西安热工研究院有限公司 | Extrusion container structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601768A (en) * | 1984-05-11 | 1986-07-22 | Hydroacoustics, Inc. | Method and apparatus for treating plastic welds to relieve stresses therein |
| EP0496044A1 (en) * | 1991-01-21 | 1992-07-29 | Jörn GmbH | Elastic support, in particular for the support of a spring-eye on the body of a vehicle |
| CN201161258Y (en) * | 2007-12-27 | 2008-12-10 | 青岛四方车辆研究所有限公司 | Retraction fixture for traction node for radial steering frame of linear electric motor |
| CN101328944A (en) * | 2008-07-24 | 2008-12-24 | 株洲时代新材料科技股份有限公司 | Rubber metal spherical joint for truck balance beam |
| CN201494459U (en) * | 2009-08-26 | 2010-06-02 | 南京雷尔伟新技术有限公司 | Elastic positioning sleeve |
-
2011
- 2011-12-22 CN CN2011104458000A patent/CN102514212A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601768A (en) * | 1984-05-11 | 1986-07-22 | Hydroacoustics, Inc. | Method and apparatus for treating plastic welds to relieve stresses therein |
| EP0496044A1 (en) * | 1991-01-21 | 1992-07-29 | Jörn GmbH | Elastic support, in particular for the support of a spring-eye on the body of a vehicle |
| CN201161258Y (en) * | 2007-12-27 | 2008-12-10 | 青岛四方车辆研究所有限公司 | Retraction fixture for traction node for radial steering frame of linear electric motor |
| CN101328944A (en) * | 2008-07-24 | 2008-12-24 | 株洲时代新材料科技股份有限公司 | Rubber metal spherical joint for truck balance beam |
| CN201494459U (en) * | 2009-08-26 | 2010-06-02 | 南京雷尔伟新技术有限公司 | Elastic positioning sleeve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798788A (en) * | 2022-04-27 | 2022-07-29 | 西安热工研究院有限公司 | Extrusion container structure |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120627 |