CN104963908A - Actuator cylinder of integrated variable damping device - Google Patents
Actuator cylinder of integrated variable damping device Download PDFInfo
- Publication number
- CN104963908A CN104963908A CN201510242857.9A CN201510242857A CN104963908A CN 104963908 A CN104963908 A CN 104963908A CN 201510242857 A CN201510242857 A CN 201510242857A CN 104963908 A CN104963908 A CN 104963908A
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- CN
- China
- Prior art keywords
- piston rod
- bridle
- stop sleeve
- damping tray
- endoporus
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses an actuator cylinder of an integrated variable damping device. The actuator cylinder comprises an outer cylinder, a cylinder bottom, and an end cover. The outer cylinder is internally provided with a piston which is installed on a piston rod. The piston separates the outer cylinder into a left cushion chamber and a right cushion chamber. The end cover is fixedly provided with a locking sleeve. An oil passing channel is formed between the locking sleeve and the outer wall of the piston rod. A structure which makes oil passing sectional area of the oil passing channel gradually reduce when the piston moves towards the locking sleeve is between the locking sleeve and the piston rod. The cylinder bottom is fixedly provided with a damping disk. The damping disk is provided with a damping disk shaft. One end of the piston rod extends out of the end cover, and the other end of the piston rod is provided with an inner bore which can be in clearance fit with the damping disk shaft. The inner bore of the piston rod is used to form the oil passing channel with the outer wall of the damping disk shaft. A structure which makes oil passing sectional area of the oil passing channel gradually reduce when the piston moves towards the damping disk direction is between the damping disk shaft and the piston rod. The load impact of the actuator cylinder is effectively reduced.
Description
Technical field
The invention belongs to Aeronautics and Astronautics undercarriage retractable actuating cylinder field, be specifically related to a kind of pressurized strut of integrated mutative damp device, it can be applicable to the product that airplane hydraulic pressure or pneumatic retractable actuating cylinder class need to need when requiring larger load at end when normal work pooling feature, is applicable to the structural member that other has similar functions simultaneously.
Background technique
Aero-Space cause is flourish in recent years, and high speed, large-tonnage aircraft application are more and more extensive, and its undercarriage control load required also increases thereupon simultaneously.Retractable actuating cylinder is as the main member providing undercarriage control load, and excessive output loads can cause it to produce larger impulsive load at end of travel, and this will produce unnecessary fatigue injury to undercarriage or airframe, reduces the aircraft utilization life-span.For avoiding this harm, often need to arrange damping device in pressurized strut.
Current domestic general employing is similar to the mode of the small damping of Fig. 1 or is similar to the mode of integrated one-way throttle valve of Fig. 2, these damping forms as Chinese patent CN200920063149.9 easily result in blockage because boring ratio is less, on the other hand, when piston rod movement changes greatly to buffer area hourly velocity, large to the compensator or trimmer pressure caused in damping cavity, it is very large that part is subject to load, must strengthen the physical dimension of part in buffer area, adding product weight for meeting requirement of strength.
Summary of the invention
The present invention aims to provide a kind of pressurized strut of integrated mutative damp device, and this pressurized strut can provide gradual change damping, to effectively reduce the load impacting of pressurized strut for the pressurized strut of large load when end of travel.
To achieve these goals, the technical solution adopted in the present invention is:
A pressurized strut for integrated mutative damp device, comprises urceolus, is fixed at the bottom of the cylinder of urceolus one end and is fixed on the end cap of the urceolus the other end; Be provided with dress piston on the piston rod in described urceolus, urceolus is divided into two buffer cavitys in left and right by this piston, and this piston can move back and forth along the axial direction of urceolus; Its structural feature is:
Described end cap is fixed with stop sleeve, between suit this stop sleeve on the piston rod and piston rod outer wall, forms oily passage; The structure that the logical oily sectional area between described stop sleeve and piston rod with the oily passage of mistake when piston moves to stop sleeve direction between stop sleeve and piston rod reduces gradually;
Be fixed with damping tray at the bottom of described cylinder, this damping tray has damping tray axle, and the axis of this damping tray axle and the axis being parallel of piston rod; One end of described piston rod is stretched out outside described end cap, and the other end of this piston rod has the endoporus that can coordinate with described damping tray shaft clearance, and the endoporus of this piston rod is used for forming oily passage with the outer wall of damping tray axle; The structure that the logical oily sectional area between described damping tray axle and piston rod with the oily passage of mistake when piston moves to damping tray direction between damping tray axle and piston rod reduces gradually.
Thus, by being provided with the structure that one section of cross section can gradually change in the axial direction at piston rod and damping tray axle, when pressurized strut is in compressed ends or when extending end, because the reduction in logical oily cross section, pressurized strut starts damping, but because the reduction that logical pasta amasss is a progressive formation, damping force is also a progressive formation changed from small to big, when this section of variable cross section stroke is covered in pressurized strut, pressurized strut damping force reaches maximum, and the stable no longer change of damping force is simultaneously until pressurized strut stops.
Be below the technological scheme of further improvement of the present invention:
Lead to the structural type in oily cross section as a kind of change specifically, described piston rod has the step of variable cross section, and the logical oily sectional area making piston rod cross oily passage when stop sleeve direction is moved reduces gradually.Further, described step outer wall has multiple tilted conical surface groove, changed the size of logical oily sectional area by the changes of section of step and groove.
Lead to the structural type in oily cross section as a kind of change specifically, described damping tray axle is frustum axle, and the logical oily sectional area making piston rod cross oily passage when damping tray direction is moved reduces gradually.Further, the outer wall of described damping tray axle has multiple variable cross section groove axial arranged along damping tray axle, changed the size of logical oily sectional area by the changes of section of frustum and variable cross section groove.
Preferably, the endoporus of described piston rod is equipped with the second bridle, and the inside groove of this second bridle to rise ring built with second; Described second ring that rises can coordinate with described damping tray shaft clearance and formed oily passage.Further, conveniently fix the second bridle, the outer wall of described second bridle has semicircle annular groove, the hole wall of the endoporus of described piston rod has semi-circular groove; The semi-circular groove of the semicircle annular groove of described second bridle and the endoporus of piston rod forms an annular groove, makes steel wire can penetrate this annular groove and be fixed on the endoporus of piston rod by the second bridle.
Described stop sleeve has the endoporus of installation first bridle, and this first bridle to rise ring built with first; The described first cylindrical Spielpassung rising by ring and described piston rod formed oily passage.Further, conveniently fix the first bridle, the outer wall of described first bridle has semicircle annular groove, the endoporus inwall of described stop sleeve has semi-circular groove; The semicircle annular groove of described first bridle and the endoporus of described stop sleeve form an annular groove, and the first bridle can be fixed on stop sleeve through this annular groove by steel wire.Preferably, described damping tray has flange, at the bottom of the flange of this damping tray is fixed on tin and between urceolus; Described stop sleeve has flange, and the flange of this stop sleeve is fixed between end cap and urceolus.
Compared with prior art, the invention has the beneficial effects as follows: logical oily passageway is set to grading structure by pressurized strut of the present invention, the reduction that logical pasta amasss is a progressive formation, damping force is also a progressive formation changed from small to big, when this section of variable cross section stroke is covered in pressurized strut, pressurized strut damping force reaches maximum, and the stable no longer change of damping force simultaneously, until pressurized strut stops, effectively reducing the load impacting of pressurized strut.
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Accompanying drawing explanation
Fig. 1 is existing small damping pressurized strut schematic diagram;
Fig. 2 is existing integrated one-way throttle valve pressurized strut schematic diagram;
Fig. 3 is the pressurized strut full compression view of an embodiment of the present invention;
Fig. 4 is the full elongation state schematic diagram of pressurized strut of an embodiment of the present invention;
Fig. 5 is piston rod schematic diagram;
Fig. 6 is damping tray schematic diagram;
Fig. 7 is stop sleeve schematic diagram;
Fig. 8 is bridle schematic diagram;
Fig. 9 is the ring schematic diagram that rises;
Figure 10 is the sectional arrangement drawing of Fig. 6.
In the drawings:
1-pipe joint, at the bottom of 2-cylinder, 3, 31, 32-piston rod, 4, 41, 42-urceolus, 5-end cap, 6-elbow, 7-Earring connector, 8-stop sleeve, 9-first bridle, 10-first rises ring, 11-damping tray, step on 12-piston rod, 13-tilted conical surface groove, 14-endoporus, 15-circular groove, 16-endoporus, the buffer cavity formed when 17-pressurized strut is stretched out, the buffer cavity formed when 18-pressurized strut is regained, 19-damping tray axle, 20-variable cross section groove, 21-semi-circular groove, 22-endoporus, 23-flange, 24-flange, 25-semi-circular groove, 26-second bridle, 27-second rises ring, 28-endoporus, 29-damping device, 33-piston, 34-filler opening.
Embodiment
A kind of pressurized strut of integrated mutative damp device, as shown in Figure 3, form primarily of rise ring 27, damping tray 11 and seal ring and pipe nipple etc. of the ring 10 and second that risen by urceolus 4, piston rod 3, end cap 5, Earring connector 7, stop sleeve 8, first bridle 9 and the second bridle 26, first.
Described piston rod 3 is installed in described urceolus 4; Described bridle 10 is installed on the endoporus of described piston rod; In described first rises annular chamber that ring 10 is installed between described bridle and described piston rod; Described stop sleeve 8 is installed in described urceolus, and the flange of stop sleeve is pressed on urceolus by described end cap 5 simultaneously, and the bar head of stop sleeve and described piston rod forms buffer cavity at extended position, as shown in Figure 4; Described second bridle 26 is installed on the endoporus of described stop sleeve; In described second rises annular chamber that ring 27 is installed between described bridle and described stop sleeve, and coordinate with described piston rod; Described end cap 5 is threaded connection on described urceolus; Described damping tray 11 is arranged on the opposite side of urceolus, and by described cylinder base pressure at urceolus end face, the axle of damping tray coordinates with the described ring that rises, and forms buffer cavity, as shown in Figure 3 between the bar head of bridle and described piston rod; Be connected with described urceolus by screw thread at the bottom of described cylinder.
Normally work for not hindering pressurized strut, the bar of described piston rod 3 is provided with a step 12, the rise endoporus 28 of ring 10 of step 12 cylindrical and described first is Spielpassung, in order to realize the function of gradual change throttling at pressurized strut protrude end, piston rod step 12 circumferentially cuts out several tilted conical surface groove, make the sectional area of step 12 vertically be gradual change relation.In order to realize the function of gradual change throttling regaining end, the rise endoporus 28 of ring 27 of the outside diameter of the damping tray axle 19 of damping tray 11 and second is Spielpassung, while on the cylinder of damping tray axle 19, be provided with the smooth stria that several cross section changes vertically.For described first bridle 9 is arranged on described piston rod 3, described piston rod arranges an endoporus 14, for described second bridle 26 is fixed in described piston rod endoporus 14, have half circular groove 15 in described piston rod endoporus 14, form a complete circular groove to install fixation with steel wire second bridle 26 with the semicircle annular groove 21 on the cylndrical surface of the second bridle 26.Described second ring 27 that rises is loaded on the inside groove 22 of described second bridle 26.
For being arranged on described urceolus 4 by described damping tray 11, by 2 being connected with described urceolus 4 by screw thread at the bottom of described cylinder, and the flange 23 of described damping tray 11 is pressed on described urceolus end face.For being arranged on described urceolus 4 by described stop sleeve 8, described stop sleeve 8 is provided with a flange 24, described end cap 5 is connected with described urceolus 4 by screw thread, described stop sleeve flange 24 is pressed in described urceolus end face simultaneously.
As shown in Figure 7, for being arranged on described stop sleeve 8 by described first bridle 9, stop sleeve 8 has an endoporus 28.For described first bridle 9 is fixed in the endoporus 28 of described stop sleeve 8, have half circular groove 25 in the endoporus 28 of described stop sleeve 8, form a complete circular groove to install fixation with steel wire first bridle 9 with the semicircle annular groove 21 on the cylndrical surface of the first bridle 9.Described first ring 10 that rises is loaded on the inside groove 22 of described first bridle 9.
Working principle of the present invention is: piston rod 3 bar footpath is provided with one section of step 12 near piston head place, Step Shaft there is several tilted conical surface groove 13, when piston rod stretches out, when piston rod step 12 enter be arranged on first in stop sleeve rise ring 10 time, gap is between the two very little, and hydraulic oil can only flow to oil back chamber along small gap, because the area of passage of fluid diminishes suddenly, between piston rod and end cap, pressure raises, and forms buffer cavity 17(as shown in Figure 4), the movement velocity of piston rod reduces.Further, because the tilted conical surface groove that the step of piston rod is arranged, make piston rod pass through area and the stroke exponentially relation in ring gap of rising, the damping force that this gap produces is also in the trend gradually changed from small to large.When piston rod is regained, when being installed on the ring that rises on piston rod and starting the axle 19 entering damping tray, the axle 19 of damping tray and the gap of rising between ring very little, hydraulic oil can only flow to oil back chamber by this small gap, damping tray axle 19 has vertically the skewed slot 20 of variable cross section, with entirely to stretch out principle identical, axle and the gap sectional area risen between ring of damping tray change from big to small, and damping force is in changing from small to large.
The content that above-described embodiment is illustrated should be understood to these embodiments only for being illustrated more clearly in the present invention, and be not used in and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen into the application's claims limited range.
Claims (10)
1. a pressurized strut for integrated mutative damp device, comprises urceolus (4), is fixed on (2) at the bottom of the cylinder of urceolus (4) one end and is fixed on the end cap (5) of urceolus (4) the other end; Be provided with one in described urceolus (4) and be contained in piston on piston rod (3), urceolus (4) is divided into two buffer cavitys (17,18) in left and right by this piston, and this piston can move back and forth along the axial direction of urceolus (4); It is characterized in that:
Described end cap (5) is fixed with stop sleeve (7), is sleeved between this stop sleeve (7) on piston rod (3) and piston rod (3) outer wall and formed oily passage; The structure that the logical oily sectional area between described stop sleeve (7) and piston rod (3) with the oily passage of mistake when piston moves to stop sleeve (7) direction between stop sleeve (7) and piston rod (3) reduces gradually;
(2) at the bottom of described cylinder are fixed with damping tray (11), this damping tray (11) has damping tray axle (19), and the axis being parallel of the axis of this damping tray axle (19) and piston rod (3); Described end cap (5) is stretched out outward in one end of described piston rod (3), the other end of this piston rod (3) have can with the endoporus (14) of described damping tray axle (19) Spielpassung, the endoporus (14) of this piston rod (3) was for forming oily passage with the outer wall of damping tray axle (19); The structure that the logical oily sectional area of the oily passage of mistake had when piston moves to damping tray (11) direction between damping tray axle (19) and piston rod (3) between described damping tray axle (19) and piston rod (3) reduces gradually.
2. the pressurized strut of integrated mutative damp device according to claim 1, it is characterized in that, described piston rod (3) has the step (12) of variable cross section, and the logical oily sectional area making piston rod (3) cross oily passage when stop sleeve (7) direction is moved reduces gradually.
3. the pressurized strut of integrated mutative damp device according to claim 2, is characterized in that, described step (12) outer wall has multiple tilted conical surface groove (13).
4. the pressurized strut of integrated mutative damp device according to claim 1, is characterized in that, described damping tray axle (19) is frustum axle, and the logical oily sectional area making piston rod (3) cross oily passage when damping tray (11) direction is moved reduces gradually.
5. the pressurized strut of integrated mutative damp device according to claim 4, is characterized in that, the outer wall of described damping tray axle (19) has multiple variable cross section groove (20) axial arranged along damping tray axle (19).
6. according to the pressurized strut of the integrated mutative damp device one of claim 1 to 5 Suo Shu, it is characterized in that, the endoporus (14) of described piston rod (3) is equipped with the second bridle (26), and the inside groove (22) of this second bridle (26) to rise ring (27) built with second; Described second ring (27) that rises can form oily passage with described damping tray axle (19) Spielpassung.
7. the pressurized strut of integrated mutative damp device according to claim 6, it is characterized in that, the outer wall of described second bridle (26) has semicircle annular groove (21), the hole wall of the endoporus (14) of described piston rod (3) has semi-circular groove (15); The semicircle annular groove (21) of described second bridle (26) forms an annular groove with the semi-circular groove (15) of the endoporus (14) of piston rod (3), makes steel wire can penetrate this annular groove and be fixed on the endoporus (14) of piston rod (3) by the second bridle (26).
8. according to the pressurized strut of the integrated mutative damp device one of claim 1 to 5 Suo Shu, it is characterized in that, described stop sleeve (7) has the endoporus (22) of installation first bridle (9), and this first bridle (9) to rise ring (10) built with first; The described first cylindrical Spielpassung rising by ring (10) and described piston rod (3) formed oily passage.
9. the pressurized strut of integrated mutative damp device according to claim 8, is characterized in that, the outer wall of described first bridle (9) has semicircle annular groove (21), and the endoporus inwall of described stop sleeve (7) has semi-circular groove (25); The semicircle annular groove (21) of described first bridle (9) and the endoporus of described stop sleeve (7) form an annular groove, make steel wire can penetrate this annular groove and be fixed on stop sleeve (7) by the first bridle (9).
10. according to the pressurized strut of the integrated mutative damp device one of claim 1 to 5 Suo Shu, it is characterized in that, described damping tray (11) has flange (23), at the bottom of the flange (23) of this damping tray (11) is fixed on tin between (2) and urceolus (4); Described stop sleeve (7) has flange (24), and the flange (24) of this stop sleeve (7) is fixed between end cap (5) and urceolus (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242857.9A CN104963908B (en) | 2015-05-13 | 2015-05-13 | A kind of pressurized strut of integrated mutative damp device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242857.9A CN104963908B (en) | 2015-05-13 | 2015-05-13 | A kind of pressurized strut of integrated mutative damp device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104963908A true CN104963908A (en) | 2015-10-07 |
| CN104963908B CN104963908B (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510242857.9A Active CN104963908B (en) | 2015-05-13 | 2015-05-13 | A kind of pressurized strut of integrated mutative damp device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952710A (en) * | 2016-07-12 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | High frequency response low friction servo hydraulic cylinder |
| CN109319099A (en) * | 2018-11-29 | 2019-02-12 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of extended travel change oilhole undercarriage buffer |
| CN110539883A (en) * | 2019-07-23 | 2019-12-06 | 北京精密机电控制设备研究所 | Undercarriage receive and releases executor |
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| EP0005407A1 (en) * | 1978-05-05 | 1979-11-14 | Climax France S.A. | End of stroke decelerating and/or accelerating means for rectilinear, alternating moving parts |
| CN201358978Y (en) * | 2009-02-09 | 2009-12-09 | 中航飞机起落架有限责任公司 | Buffering mechanism for piston buffer cavity type hydraulic actuating cylinder |
| CN201396336Y (en) * | 2009-03-26 | 2010-02-03 | 杭州西子船舶液压工程机械有限公司 | Lifting cylinder with buffer device for forklift truck |
| CN101776105A (en) * | 2010-03-04 | 2010-07-14 | 合肥市力恒科技有限责任公司 | Single-acting piston type buffering hydraulic oil cylinder |
| CN202012528U (en) * | 2011-04-27 | 2011-10-19 | 三一重工股份有限公司 | Hydraulic cylinder and buffer device thereof |
| CN203441863U (en) * | 2013-09-02 | 2014-02-19 | 山西北方机械制造有限责任公司 | Oil cylinder device capable of achieving buffering after unloading |
| CN103629188A (en) * | 2013-12-11 | 2014-03-12 | 四川凌峰航空液压机械有限公司 | Buffer device for actuator drum |
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2015
- 2015-05-13 CN CN201510242857.9A patent/CN104963908B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0005407A1 (en) * | 1978-05-05 | 1979-11-14 | Climax France S.A. | End of stroke decelerating and/or accelerating means for rectilinear, alternating moving parts |
| CN201358978Y (en) * | 2009-02-09 | 2009-12-09 | 中航飞机起落架有限责任公司 | Buffering mechanism for piston buffer cavity type hydraulic actuating cylinder |
| CN201396336Y (en) * | 2009-03-26 | 2010-02-03 | 杭州西子船舶液压工程机械有限公司 | Lifting cylinder with buffer device for forklift truck |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952710A (en) * | 2016-07-12 | 2016-09-21 | 天津优瑞纳斯液压机械有限公司 | High frequency response low friction servo hydraulic cylinder |
| CN109319099A (en) * | 2018-11-29 | 2019-02-12 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of extended travel change oilhole undercarriage buffer |
| CN109319099B (en) * | 2018-11-29 | 2021-07-09 | 中国航空工业集团公司沈阳飞机设计研究所 | Extension stroke becomes oilhole undercarriage buffer |
| CN110539883A (en) * | 2019-07-23 | 2019-12-06 | 北京精密机电控制设备研究所 | Undercarriage receive and releases executor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104963908B (en) | 2017-03-01 |
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