CN2614974Y - Differential plunger type hydraulic tension compensation device - Google Patents
Differential plunger type hydraulic tension compensation device Download PDFInfo
- Publication number
- CN2614974Y CN2614974Y CN 03218606 CN03218606U CN2614974Y CN 2614974 Y CN2614974 Y CN 2614974Y CN 03218606 CN03218606 CN 03218606 CN 03218606 U CN03218606 U CN 03218606U CN 2614974 Y CN2614974 Y CN 2614974Y
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- CN
- China
- Prior art keywords
- plunger
- differential
- spring
- clue
- cylinder barrel
- 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.)
- Expired - Fee Related
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 241001504664 Crossocheilus latius Species 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
A differential plunger type hydraulic tension compensation device is characterized in that an annular step (4) is arranged at the joint of two sections of plungers (2), one end of each plunger (2) is a hollow body, and a spring (6) is arranged in each plunger. Two ends of the spring (6) are respectively propped against the inner bottom of the plunger (2) and the inner bottom of the end cap (7). The annular step (4) is positioned in the hydraulic oil (9) in the middle of the cylinder barrel (3). The device has simple structure, small volume and reliable performance, can ensure that the tension of the cable is always kept constant when the temperature changes, and is suitable for the requirements of the electrified railways and urban subways.
Description
Technical field
The utility model relates to a kind of differential plunger formula hydraulic pressure tension compensating mechanism.
Background technology
Tension compensating mechanism is used for the clue (as the contact wire and the catenary of electrification railway contact net) of requirement constant tension, its function guarantees that for compensating clue because of stretching that temperature traverse produces clue keeps constant tension force under the condition of extraneous temperature traverse.
Existing tension compensating mechanism has two types of mechanical type and fluid pressure types (or gas-liquid mixed formula).
Mechanical type generally constitutes by weighing down stone roller string and assembly pulley, and pulley block in series utilizes the gravity that weighs down the stone roller string to keep the clue constant tension at the clue end, and assembly pulley plays reinforcement and conversion direction (changing the tension force of horizontal direction into vertical direction).The mechanical type tension compensating mechanism is made easily, but bulky heaviness can not integral body be connected in the clue, and it is bigger to take up room, and inconvenience is used under the situation in the tunnel etc.; Transmission link is many, and driving efficiency is lower; And weigh down the stone roller string and be subjected to windage big, need to install with special support.
Fluid pressure type is made up of hydraulic cylinder, piston, fluid storage tank and link, is series in the clue, utilizes the driven plunger of expanding with heat and contract with cold of hydraulic oil, and stretching of compensation clue keeps the clue constant tension.The gas-liquid mixed formula has been set up air bag in fluid storage tank, utilize the big characteristic of E, can reduce the volume of fluid storage tank.These two kinds of compensating devices are compared with mechanical type, and volume reduces to some extent, but because of the piston cylinder operator restriction, the store oil amount is bigger, are connected in series with still to seem heavy in the clue; When piston motion was extremely stretched out fully, the guidance quality variation easily caused the seal ring eccentric wear, reduces service life; Inner cavity of cylinder precision height, processing difficulties, cost height have limited it and have applied.Gas liquid type is provided with air bag for reducing volume, but sealing is more difficult, and not only cost is higher, and reliability reduces.
The content of utility model
The technical problems to be solved in the utility model is for overcoming the described deficiency of background technology, and provide a kind of simple in structure, volume is little, cost is low, dependable performance, can effectively guarantee the differential plunger formula hydraulic pressure tension compensating mechanism that thread tension force is constant.
Technological improvement of the present utility model is: the connecting place at two sections plungers has a ring-shaped step, and an end of plunger is a hollow body, is built-in with spring.
Further technological improvement of the present utility model is: the two ends of spring offset with the interior end of plunger and the interior end of end cap respectively.Ring-shaped step is positioned at the hydraulic oil at cylinder barrel middle part.
By above Technological improvement plan as can be seen, the good effect that the utility model produced is:
A, owing to adopted differential plunger formula structure, broken through the restriction on the piston cylinder operator, the plunger active area can reduce arbitrarily, is convenient to improve operation pressure, thereby the volume of alleviator and weight are more suitable for being connected in the clue than piston type (comprising the gas-liquid mixed formula).
B, differential plunger formula structure unite two into one oil storage chamber and epitrochoidal chamber, have cancelled special oil storage chamber and connecting line, make that apparatus structure is simple, connecting portion is few, have reduced the possibility of leaking, and have significantly improved the functional reliability of device.
C, differential plunger formula structure two ends guiding, guiding is good all the time in the plunger total travel, and the seal ring eccentric wear free can improve service life.
The setting of d, back pressure spring, the compressibility of cooperation fluid can form effective damping, the vibration that the decay clue produces because of impulsive force.
E, compare,, improved efficient, promoted being quick on the draw property owing to cancelled the transmission link of steel rope and assembly pulley with mechanical type.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
As shown in drawings, this device has a cylinder barrel 3, and by front end cover 5 and rear side housing 1 sealing, cylinder barrel 3 middle parts have a space, are filled with hydraulic oil 9 in it respectively at its two ends.A plunger 2 is through rear side housing 1 and front end cover 5, and the leading portion of this plunger 2 is a hollow cylinder, and back segment is a solid cylinder.These plunger of two sections, 2 diameter differences, the diameter of leading portion that is provided with hollow body is provided with a ring-shaped step 4 greater than the back segment of solid at two sections connecting places.Said this annular table attached 4 can be a taper-face ring, also can be a planar rings.Be provided with a spring 6 in the leading portion of plunger 2, the two ends of this spring 6 respectively with plunger 2 in the interior end of the ends and the end cap 6 that links to each other with front end cover 5 offset.In order to guarantee that hydraulic oil 9 can not leak in plunger 2 reciprocating travels, be provided with sealing member 8 in the contact position of front end cover 5 and rear side housing 1 and plunger 2.Also be provided with a zerk 10 on the cylinder barrel 3.
This device is with after clue is connected, and when external temperature rose, the hydraulic oil cubic expansion in the cylinder barrel also produced pressure, and this pressure acts on the ring-shaped step, promotes plunger and compression spring, the linear expansion that the compensation clue produces; When external temperature descends, the hydraulic oil volumetric shrinkage in the cylinder barrel, plunger is outward direction motion again under the effect of spring, the linear shrinkage that the compensation clue produces.By coupling fluid amount, plunger active area and clue material and length, make the plunger stroke identical with the clue stroke, can compensate the tension variation of clue, to guarantee that thread tension force remains constant in the range of temperatures of regulation because of expanding with heat and contract with cold and producing.
Claims (4)
1, a kind of differential plunger formula hydraulic pressure tension compensating mechanism, the front end cover (5) and the rear side housing (1) that comprise a cylinder barrel (3) and sealing cylinder barrel (3), it is characterized in that having a ring-shaped step (4) at the connecting place of two sections plungers (2), an end of plunger (2) is a hollow body, is built-in with spring (6).
2, differential plunger formula hydraulic pressure tension compensating mechanism as claimed in claim 1 is characterized in that the two ends of spring (6) offset with the interior end of plunger (2) and the interior end of end cap (7) respectively.
3, differential plunger formula hydraulic pressure tension compensating mechanism as claimed in claim 1 is characterized in that ring-shaped step (4) is positioned at the hydraulic oil (9) at cylinder barrel (3) middle part.
4, differential plunger formula hydraulic pressure tension compensating mechanism as claimed in claim 1 is characterized in that being provided with sealing member (8) between the outside face of plunger (2) and the front and rear cover (5,1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218606 CN2614974Y (en) | 2003-03-13 | 2003-03-13 | Differential plunger type hydraulic tension compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218606 CN2614974Y (en) | 2003-03-13 | 2003-03-13 | Differential plunger type hydraulic tension compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2614974Y true CN2614974Y (en) | 2004-05-12 |
Family
ID=34243953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03218606 Expired - Fee Related CN2614974Y (en) | 2003-03-13 | 2003-03-13 | Differential plunger type hydraulic tension compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2614974Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618686B (en) * | 2008-07-02 | 2011-09-21 | 南车襄樊机车有限公司 | Spring tensioner |
| CN104358733A (en) * | 2014-10-14 | 2015-02-18 | 湖州环丰机械有限公司 | Oil injection structure of oil cylinder |
| CN106602491A (en) * | 2016-12-29 | 2017-04-26 | 山东鱼台圣宏电力安装有限公司 | Automatic expansion joint, power equipment anti-thermal-strain device, and power equipment |
| CN106684790A (en) * | 2016-12-29 | 2017-05-17 | 国网山东省电力公司枣庄供电公司 | Temperature variation compensator, electrical equipment, power grid installation facility and power grid system |
| CN107618403A (en) * | 2017-09-18 | 2018-01-23 | 西南交通大学 | A kind of dropper |
-
2003
- 2003-03-13 CN CN 03218606 patent/CN2614974Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618686B (en) * | 2008-07-02 | 2011-09-21 | 南车襄樊机车有限公司 | Spring tensioner |
| CN104358733A (en) * | 2014-10-14 | 2015-02-18 | 湖州环丰机械有限公司 | Oil injection structure of oil cylinder |
| CN106602491A (en) * | 2016-12-29 | 2017-04-26 | 山东鱼台圣宏电力安装有限公司 | Automatic expansion joint, power equipment anti-thermal-strain device, and power equipment |
| CN106684790A (en) * | 2016-12-29 | 2017-05-17 | 国网山东省电力公司枣庄供电公司 | Temperature variation compensator, electrical equipment, power grid installation facility and power grid system |
| CN106602491B (en) * | 2016-12-29 | 2019-01-18 | 山东济宁圣地电业集团有限公司鱼台圣宏电力安装分公司 | Automatic telescopic device, power equipment heat resistanceheat resistant strain device, power equipment |
| CN106684790B (en) * | 2016-12-29 | 2019-03-15 | 国网山东省电力公司枣庄供电公司 | Temperature becomes expansion bend, power equipment, power grid installation, network system |
| CN107618403A (en) * | 2017-09-18 | 2018-01-23 | 西南交通大学 | A kind of dropper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |