CN101514731B - Viscous fluid damper - Google Patents

Viscous fluid damper Download PDF

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Publication number
CN101514731B
CN101514731B CN2009100806680A CN200910080668A CN101514731B CN 101514731 B CN101514731 B CN 101514731B CN 2009100806680 A CN2009100806680 A CN 2009100806680A CN 200910080668 A CN200910080668 A CN 200910080668A CN 101514731 B CN101514731 B CN 101514731B
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CN
China
Prior art keywords
piston
viscous fluid
piston rod
moves
rod
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CN2009100806680A
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Chinese (zh)
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CN101514731A (en
Inventor
刘建军
夏开全
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中国电力科学研究院
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Priority to CN2009100806680A priority Critical patent/CN101514731B/en
Publication of CN101514731A publication Critical patent/CN101514731A/en
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Publication of CN101514731B publication Critical patent/CN101514731B/en

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Abstract

The invention relates to a viscous fluid damper with good performance, comprising a closed cylinder with end covers arranged on both ends, a piston positioned in the cylinder cavity and a piston rod connected with the piston; wherein, the cylinder is filled with viscous fluid or controlled fluid; the piston comprises fixed piston discs sheathed on and fixedly connected with the piston rod and full floating piston discs sliding relatively along the piston rod; the full floating piston discs are positioned among the fixed piston discs and are mutually connected by elastic connectors; throttle route ways are arranged between the external side walls of the fixed piston discs and the full floating piston discs and the internal side wall of the cylinder. The damper has two dependent control characteristics such as speed and displacement, can store and release energy in the process of vibration reduction, not only has certain real time tunability, but also has good controllability and reliability and can be universally suitable for vibration control of special structures such as automobiles, machinery, aviation, civil engineering and transmission line, etc.

Description

A kind of viscous fluid damper

Technical field

The present invention relates to the engineering damping technology, specifically relate to a kind of well behaved viscous fluid damper, can generally be applicable in the vibration control of unique constructions such as automobile, machinery, aviation, civil engineering and electric transmission line.

Background technique

The fluid damping technology is a kind of vibration damping controlling method of function admirable, it is based on the principle of flow of pore, by regulating the size of pore with non-uniform cross section, thereby regulate the span of damping constant, has good oscillation damping and energy dissipating effect, be that new life has been injected in the development that appears as damping of the intellectual material of representative with magnetic flow liquid and electrorheological fluid in recent years, they combine the fluid damping technology with the strategy of ACTIVE CONTROL, brought into play very big using value in various vibration dampings field gradually.But fluid damping device piston structure pattern in the market is generally comparatively single, often lack relative movement between piston and piston rod, the mechanism of damping energy dissipation mainly is to lean on the viscous force and the Stuart Bingham yield force of mesopore fluid to play a role, externally show very strong velocity correlation, obvious inadequately to displacement control effect.In addition, at present fluid damper very easily occurs in the reciprocating motion of the pistons process because both sides, gap fluid volume compensates " idle running " phenomenon that causes not prompt enough, and this all is undoubtedly a kind of huge infringement to the reliability of damping force and damper long-lasting.

Summary of the invention

For overcoming the defective of prior art, the object of the present invention is to provide a kind of viscous fluid damper with good controllability, reliability, this damper has speed and two kinds of relationship type control features of displacement, can store in the vibration damping process and release energy, and has certain real-time tuning performance.

Above-mentioned purpose for this reason, the present invention is by the following technical solutions: a kind of viscous fluid damper, comprise that two ends are provided with the airtight cylinder barrel of end cap, place the piston in the cylinder barrel chamber and connect the piston rod of piston, fill viscous fluid or controlled fluid in the cylinder barrel, it is characterized in that described piston comprises is set on the piston rod and with the affixed fixed piston dish of piston rod with along the piston plate that moves about of piston rod slide relative, the piston plate that moves about places between the fixed piston dish and the left and right sides of the piston plate that moves about all is connected with the fixed piston dish by Flexible Connector, and the outer side wall of the described fixed piston dish and the piston plate that moves about all and between the madial wall of cylinder barrel is provided with throttling passage.

Described Flexible Connector be evenly distributed on piston rod around, its two ends are connected and fixed the piston plate and the piston plate that moves about respectively.

Described Flexible Connector is set on the piston rod, and its two ends are connected and fixed piston plate respectively and the piston plate that moves about.

The two ends of described piston rod are provided with assembling earrings or ballhead.

The described piston plate that moves about is provided with guide rod, the axis of guide rod parallels with the axis of piston rod and guide rod be evenly distributed on piston rod around, the two ends of guide rod are connected with the fixed piston dish respectively.

One slippage bar is installed in the middle of the described piston rod, and the piston plate that moves about is socketed on the slippage bar, and the fixed piston dish is socketed on the piston rod at slippage bar two ends, and the cross section of described slippage bar is the polygonal less than the cross section of piston rod.

Described Flexible Connector adopts spring.

Described viscous fluid adopts silicone oil, machinery oil, diesel engine oil or transformer oil, and described controlled fluid adopts magnetic flow liquid or electrorheological fluid.

Beneficial effect of the present invention is as follows:

1, piston adopts the structure of the fixed piston dish and the piston plate that moves about, and between the fixed piston plate of type piston plate and both sides that moves about, be connected by Flexible Connector, wherein move about piston plate to can provide bigger damping force under big displacement state, have good structure adaptive characteristic and position-limiting action, have good controllability and certain ACTIVE CONTROL effect; For bigger impact load, adding of the piston plate that moves about can effectively utilize elastic energy that both sides, gap volumetric pressure difference is compensated, thereby guarantees the reliability of damper.

2, Flexible Connector adopts the stiffness spring, driving force for piston plate is more powerful, more reliable, especially adopt the stiffness spring housing is located at structure on the piston rod, make the fixed piston dish and the stressed more even of piston plate that move about, improved the global reliability of damper.

3, the design of guide rod, the piston plate that not only guaranteed to move about is done straight reciprocating motion along piston rod, and stressed evenly, stable, reliable, the drawback of swing up and down appears in the piston plate of avoiding moving about when motion.

4, the design of slippage bar, adopt the structure of slippage bar cross section less than the piston rod cross section, avoid Flexible Connector because the drawback that the excessive generation distortion of displacement can't be restored, polygonal can better avoid the moving about drawback of piston plate swing is adopted in the cross section of slippage bar, makes damper of the present invention more stable, more reliable.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention 1;

Fig. 2 is the structural representation of the embodiment of the invention 2;

Fig. 3 is the structural representation of the embodiment of the invention 3;

Fig. 4 is the A-A sectional view of Fig. 3;

Fig. 5 is the structural representation of the embodiment of the invention 4;

Fig. 6 is the B-B sectional view of Fig. 5;

Wherein: 1-assembles earrings, 2-piston rod, 3-cylinder barrel, 4-end cap, 5-fixed piston dish, the 6-piston plate that moves about, 7-throttling passage, 8-Flexible Connector, 9-viscous fluid, 11-guide rod, 12-slippage bar.

Embodiment

Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.

Embodiment 1

As shown in Figure 1, viscous fluid damper in this example comprises that two ends are provided with the cylindrical enclosure cylinder barrel 3 of end cap 4, place two the fixed piston dishes 5 in the cylinder barrel, move about a piston plate 6 and a piston rod 2, be filled with viscous fluid 9 in the cylinder barrel, this viscous fluid 9 also can adopt controlled fluid, and wherein viscous fluid is selected silicone oil, machinery oil, diesel engine oil or transformer wet goods for use; Controlled fluid is selected magnetic flow liquid or electrorheological fluid etc. for use.Described one moves about, and piston plate 6 places between two fixed piston dishes 5 and connect by a piston rod 2, fixed piston dish 5 is affixed with piston rod 2, the piston plate 6 that moves about can be made slide relative along piston rod 2, one two springs 8 that each side pass through that move about piston plate 6 connect a fixed piston dish, spring be evenly distributed in piston rod 2 around, also can increase the quantity of spring 8 according to actual conditions, the outer side wall of the described fixed piston dish 5 and the piston plate 6 that moves about all and be provided with throttling passage 7 between the madial wall of cylinder barrel 3, piston rod 2 places cylinder barrel 3 outer two ends to be provided with assembling earrings 1 (the assembling earrings also can adopt the ballhead structure).The dish of fixed piston described in this example and the piston plate that moves about all adopt existing piston plate known in those skilled in the art, and described spring is to adopt the bigger spring (calling the stiffness spring in the following text) of [coefficient of for good.

Working principle of the present invention is:

When bearing less impact load, this moment, the damper piston relative shift was less, speed plays a major role, and externally mainly shows as the velocity correlation control of damper, during use, the reciprocal external force at damper two ends promotes piston rod 2, the viscous fluid 9 (or controlled fluid) of the left and right sides just can pass through throttling passage 7 in the cylinder barrel 3, and move about piston plate this moment under the effect of both sides fluid pressure differential, slides along piston rod and fluid same direction of movement, the stiffness tensioned, stored energy.When piston body commutation motion, fluid flows in the opposite direction, and piston plate and stiffness spring release energy thereby drive is moved about, and gap location both sides volumetric pressure difference is compensated;

When bearing the greater impact load, this moment, the damper piston relative shift was bigger, displacement amount plays a major role, externally mainly show as the displacement coherence control of damper, during use, the reciprocal external force at damper two ends promotes piston rod 2, the viscous fluid 9 (or controlled fluid) of the left and right sides just can pass through throttling passage 7 in the cylinder barrel 3, move about piston plate under the effect of both sides fluid pressure differential this moment, slide fast along piston rod and fluid same direction of movement, the stiffness spring is stored repeatedly and is released energy to the compensation of both sides volumetric pressure difference, on the other hand on the one hand, the piston plate that moves about becomes the tuning quality piece at the volley, to vibration frequency decay power consumption.

Embodiment 2

As shown in Figure 2, the structure of damper described in this example and working principle are substantially with embodiment 1, have only and different be, one move about piston plate 6 each side connect a fixed piston dish by a spring 8 that is set on the piston rod 2, this structure makes the fixed piston dish and the stressed more even of piston plate that move about, and has improved the global reliability of damper.

Embodiment 3

Shown in Fig. 3,4, the structure of damper described in this example and working principle are substantially with embodiment 2, have only and different be, move about and two guide rods 11 are installed on the piston plate 6, the axis of guide rod 11 parallels with the axis of piston rod and the symmetrical both sides that are distributed in piston rod 2, and the two ends of guide rod are connected with fixed piston dish 5 respectively.During practical application, can increase the number of guide rod 11 as required, but guarantee guide rod be evenly distributed in piston rod around, this kind structure piston plate that not only guaranteed to move about is done straight reciprocating motion along piston rod, and stressed evenly, stable, reliable, the drawback of swing up and down appears in the piston plate of avoiding moving about when motion.

Embodiment 4

Shown in Fig. 5,6, the structure of damper described in this example and working principle are substantially with embodiment 1, have only and different be, one slippage bar 12 is installed in the middle of one piston rod 2, socket one piston plate 6 that moves about on the slippage bar, difference socket one fixed piston dish 5 on the piston rod 2 at slippage bar two ends, fixed piston dish 5 is affixed with piston rod 2, and the piston plate 6 that moves about is reciprocating along slippage bar 12.The cross section of slippage bar 12 by piston rod is blocked, avoids spring deform with the piston plate motion amplitude that guarantees to move about when excessive less than the cross section of piston rod 2, and the cross section of slippage bar 12 is that polygonal (for example rectangle, the triangle etc.) piston plate of can guaranteeing to move about can not swung in to-and-fro motion.

When slippage bar 12 and embodiment's 3 described guide rods 11 were used, the cross section of slippage bar can be the circle identical with the piston rod cross section, also can be polygonal.

The piston of damper of the present invention is split as the fixed piston dish and the piston plate that moves about, both had good velocity correlation, have the control of displacement preferably effect again concurrently, the piston plate that moves about links to each other with the fixed piston dish by the stiffness spring, the stiffness spring can be stored in the piston motion process and release energy repeatedly, improved the single energy dissipation behavior of conventional damper.

Should be noted that at last: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (9)

1. viscous fluid damper, comprise that two ends are provided with the airtight cylinder barrel (3) of end cap (4), place the piston in the cylinder barrel chamber and connect the piston rod (2) of piston, fill viscous fluid (9) or controlled fluid in the cylinder barrel, it is characterized in that described piston comprises is set in that piston rod (2) is gone up and with the affixed fixed piston dish (5) of piston rod with along the piston plate that moves about (6) of piston rod slide relative, the piston plate (6) that moves about places between the fixed piston dish (5) and the left and right sides of the piston plate that moves about (6) all is connected with fixed piston dish (5) by Flexible Connector (8), and the outer side wall of described fixed piston dish (5) and the piston plate that moves about (6) all and be provided with throttling passage (7) between the madial wall of cylinder barrel (3).
2. viscous fluid damper as claimed in claim 1, it is characterized in that described Flexible Connector (8) be evenly distributed on piston rod (2) around, its two ends are connected and fixed piston plate (5) and the piston plate that moves about (6) respectively.
3. viscous fluid damper as claimed in claim 1 is characterized in that described Flexible Connector (8) is set on the piston rod (2), and its two ends are connected and fixed piston plate (5) and the piston plate that moves about (6) respectively.
4. viscous fluid damper as claimed in claim 1 is characterized in that the two ends of described piston rod (2) are provided with assembling earrings (1) or ballhead.
5. as the arbitrary described viscous fluid damper of claim 1-4, it is characterized in that the described piston plate that moves about (6) is provided with guide rod (11), the axis of guide rod parallels with the axis of piston rod (2) and guide rod be evenly distributed on piston rod around, the two ends of guide rod (11) are connected with fixed piston dish (5) respectively.
6. as the arbitrary described viscous fluid damper of claim 1-4, the middle slippage bar (12) of installing that it is characterized in that described piston rod (2), the piston plate (6) that moves about is socketed on the slippage bar (12), the fixed piston dish is socketed on the piston rod (2) at slippage bar two ends, and the cross section of described slippage bar is the polygonal less than the cross section of piston rod.
7. as the arbitrary described viscous fluid damper of claim 1-3, it is characterized in that described Flexible Connector (8) adopts spring.
8. viscous fluid damper as claimed in claim 1 is characterized in that described viscous fluid (9) adopts silicone oil, machinery oil, diesel engine oil or transformer oil.
9. viscous fluid damper as claimed in claim 1 is characterized in that described controlled fluid adopts magnetic flow liquid or electrorheological fluid.
CN2009100806680A 2009-03-25 2009-03-25 Viscous fluid damper CN101514731B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100806680A CN101514731B (en) 2009-03-25 2009-03-25 Viscous fluid damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009100806680A CN101514731B (en) 2009-03-25 2009-03-25 Viscous fluid damper

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CN101514731A CN101514731A (en) 2009-08-26
CN101514731B true CN101514731B (en) 2010-12-01

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Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102032304B (en) * 2010-12-29 2012-09-05 北京交通大学 Magnetic fluid damping device
CN102042359B (en) * 2011-01-19 2012-07-11 北京交通大学 Magnetic liquid damping device
CN102943838B (en) * 2012-11-23 2015-02-18 株洲时代新材料科技股份有限公司 Base vibration isolation device with spring and magnetic fluid
CN104452576B (en) * 2014-12-08 2016-06-01 湖南科技大学 Speed displacement two lock adjustable type viscous damper
CN104674968B (en) * 2015-01-29 2016-10-05 苏州科技学院 Integral type hole power consumption annular tuned mass damper
CN105015386B (en) * 2015-06-29 2018-02-02 苏州中航中振汽车饰件有限公司 Automotive seat delay spring assembly
CN105034901B (en) * 2015-06-29 2017-11-21 苏州中航中振汽车饰件有限公司 Seat suspension adjusts spring assembly
WO2017118376A1 (en) * 2016-01-05 2017-07-13 The Hong Kong University Of Science And Technology Bi-linear energy dissipating and shock absorbing device for cable subjected to tension
CN105692459B (en) * 2016-04-07 2019-01-08 徐州重型机械有限公司 Vibration-proof structure and crane
CN108609491B (en) * 2018-04-25 2020-08-04 武汉理工大学 Crane anti-swing mechanism using non-Newtonian fluid
CN108571542A (en) * 2018-04-28 2018-09-25 四川师范大学 A kind of elasticity hinge brake that elasticity can gradually discharge
CN108644272A (en) * 2018-04-28 2018-10-12 四川师范大学 A kind of manufacturing method for the elasticity hinge brake that elasticity can gradually discharge
CN108915113B (en) * 2018-07-02 2020-09-29 兰州理工大学 Sectional combined energy-consuming damping viscous damper
CN109707780A (en) * 2019-01-10 2019-05-03 江苏大学 A kind of anti-impact damper having speed Decoupling Characteristics

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Owner name: STATE ELECTRIC NET CROP.

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Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15

Patentee after: China Electric Power Research Institute

Patentee after: State Grid Corporation of China

Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 China Electric Power Research Institute of the Ministry of science and technology

Patentee before: China Electric Power Research Institute