CN103075384B - Friction-free hydraulic cylinder for primary mirror support - Google Patents
Friction-free hydraulic cylinder for primary mirror support Download PDFInfo
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- CN103075384B CN103075384B CN201310037248.0A CN201310037248A CN103075384B CN 103075384 B CN103075384 B CN 103075384B CN 201310037248 A CN201310037248 A CN 201310037248A CN 103075384 B CN103075384 B CN 103075384B
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Abstract
The invention provides a friction-free hydraulic cylinder for primary mirror support and relates to the technical field of primary mirror support, and the friction-free hydraulic cylinder can be used for solving the problem that friction is generated as an existing hydraulic cylinder adopts an O-shaped seal ring. The hydraulic cylinder comprises a cylinder body, an oil port, an air outlet, a fixed shaft, an upper piston, a middle piston, a lower piston, rolling films and supporting films, wherein the interior of the cylinder body is provided with a cavity; the oil port and the air outlet are formed on the cylinder body; the fixed shaft is arranged in the central through hole of the cylinder body; the upper piston, the middle piston and the lower piston are sequentially arranged on the fixed shaft, the upper piston and the lower piston are respectively connected with the fixed shaft by virtue of locking nuts, the upper piston is provided with a flange plate, and the middle piston is positioned in the cavity of the cylinder body; the rolling films are respectively fixed between the upper piston and the cylinder body, between the middle piston and the cylinder body and between the lower piston and the cylinder body by virtue of film pressing plates; the inner cavity of the cylinder body is divided into two oil cavities by the middle piston and the rolling films; and the supporting films are arranged on the upper piston and the lower piston by virtue of film pressing blocks, and the edges of the supporting films are connected with the cylinder body by virtue of screws. According to the friction-free hydraulic cylinder, the cylinder body and the pistons are sealed by virtue of the soft rolling films, so that the O-shaped seal ring is prevented from generating friction.
Description
Technical field
The present invention relates to primary mirror support technical field, be specifically related to a kind of friction-free hydraulic cylinder for primary mirror support.
Background technique
Astronomical telescope is the important tool of mankind's exploration of the universe, and its exploring ability is directly related with primary mirror caliber size, and primary mirror bore its light collecting light ability larger is stronger, and Effect on Detecting is better.Traditional large aperture telescope primary mirror support generally uses mechanical type Whiffletree structure, whiffletree structure is that support force is evenly distributed on the strong point that contacts with primary mirror minute surface back by a kind of rocker structure, along with the increase of primary mirror bore, the strong point increased number needed, whiffletree structure needs two-layer, three layers of even more multi-layered structure, the difficulty considerably increasing design, make and debug, uses whiffletree structure also just more and more difficult to primary mirror support.
At present, hydraulic pressure support on more external large aperture telescope, hydraulic pressure support is as a kind of support form, it places the oil hydraulic cylinder be interconnected below the strong point of primary mirror, and due to law of connected vessels, the support force that the oil hydraulic cylinder of connection exports is identical, therefore hydraulic pressure support is also referred to as hydraulic pressure whiffletree structure, but compare traditional mechanical type whiffletree structure, the advantages such as hydraulic support system has more compact structure, and position regulation is more convenient.
In hydraulic support system, the parts of most critical are oil hydraulic cylinders, traditional oil hydraulic cylinder utilizes O RunddichtringO as the seal element between cylinder body and piston, in order to reach good sealing effect, it is very tight that O RunddichtringO is extruded, cause the frictional force between cylinder body and piston very large, and this frictional force is do not allow existence in large aperture telescope primary mirror support system, it exists does not have connecting vessels effect by between the oil hydraulic cylinder causing being communicated with, each oil hydraulic cylinder ouput force is not identical, the effect that each strong point of primary mirror minute surface is subject to different ouput force easily causes surface deformation, have a strong impact on Effect on Detecting.
Summary of the invention
Making to produce between cylinder body and piston the problem of frictional force in order to solve existing oil hydraulic cylinder employing O RunddichtringO sealing, the invention provides a kind of friction-free hydraulic cylinder for primary mirror support.
The technological scheme that the present invention adopts for technical solution problem is as follows:
For the friction-free hydraulic cylinder of primary mirror support, comprising:
The cylinder body of inner one-tenth cavity;
Be arranged on the hydraulic fluid port on described cylinder body and relief opening;
Be arranged on the stationary axle in the central through bore of described cylinder body;
Be arranged on the upper piston on described stationary axle, middle piston and lower piston successively, described upper piston and lower piston are fixedly linked respectively by locking nut and described stationary axle, and described upper piston is provided with flange plate, and described middle piston is positioned at the cavity of described cylinder body;
Also comprise:
Be fixed on described upper piston, middle piston, rolling film between lower piston and cylinder body respectively by film platen, inner chamber of cylinder block is divided into two oil pockets by described middle piston and rolling film;
Be arranged on the support diaphragm on described upper piston and lower piston respectively by diaphragm follower, described support diaphragm edge is connected with described cylinder body by screw.
Described cylinder body comprises upper cylinder body and lower cylinder body, described upper cylinder body is provided with relief opening and upper hydraulic fluid port; Described lower cylinder body is provided with lower relief opening and lower hydraulic fluid port.
In described upper relief opening, outlet valve is installed; In described lower relief opening, lower outlet valve is installed.
Described upper cylinder body is provided with rubber pad.
Adopt rolling film to seal between described upper cylinder body and upper piston, described upper rolling film is separately fixed on described upper cylinder body and upper piston by upper film platen;
In adopting between described upper cylinder body and middle piston, rolling film seals, and described middle rolling film is separately fixed on described upper cylinder body and middle piston by middle film platen;
Adopt lower rolling film to seal between described lower cylinder body and lower piston, described lower rolling film is separately fixed on described lower cylinder body and lower piston by lower film platen.
Described upper piston is fixedly linked by upper locking nut and described stationary axle; Described lower piston is fixedly linked by lower locking nut and described stationary axle.
Described support diaphragm comprises support diaphragm and lower support diaphragm;
Described upper support diaphragm edge is fixedly linked by screw and described upper cylinder body, its center is fixedly linked by screw and described upper piston, adopt upper diaphragm briquetting to push down support diaphragm, and by upper locking nut, locking is fixed to upper diaphragm briquetting, upper support diaphragm and upper piston;
Described lower support diaphragm edge is fixedly linked by screw and described lower cylinder body, its center is fixedly linked by screw and described lower piston, adopt lower diaphragm follower to push down lower support diaphragm, and by lower locking nut, locking is fixed to lower diaphragm follower, lower support diaphragm and lower piston.
Described oil pocket comprises upper oil cavitie and lower oil cavitie, and described upper oil cavitie communicates with upper relief opening and upper hydraulic fluid port, and described lower oil cavitie communicates with lower relief opening and lower hydraulic fluid port.
Described rolling film is disk-like structure, and there are installation strumae or fastening flange in thin film disk outer ring, can arrange or not arrange fixed hole in the middle of thin film disk.
Described rolling film adopts composite stratified material to make, and be divided into two-layer, first layer is the woven layer of terylene or other fibers, and the second layer is nitrile rubber layer or other oil resistant rubber layers.
The invention has the beneficial effects as follows:
1, oil hydraulic cylinder of the present invention is by using soft rolling film as the sealing between hydraulic cylinder body and piston, avoid and use traditional O RunddichtringO and produce the problem of frictional force, eliminate the frictional force between cylinder body and piston, make the oil hydraulic cylinder of series connection really play the effect of connecting vessels;
2, inner chamber of cylinder block is divided into two oil pockets by middle piston and rolling film by oil hydraulic cylinder of the present invention, makes the motion of piston more stable, not by external interference;
3, oil hydraulic cylinder of the present invention also uses support diaphragm that the weak lateral rigidity of axial rigidity is strong as the positioning device of piston, and the outbound course of piston is controlled, and compare and use traditional line bearing, without mechanisms such as oily linings, structure is compacter, efficiency is higher;
4, oil hydraulic cylinder of the present invention is provided with rubber pad on upper cylinder body, and when oil hydraulic cylinder is in resting state, the flange plate of upper piston falls within rubber pad, and oil hydraulic cylinder is now in a safe condition, adds the Security of oil hydraulic cylinder.
Accompanying drawing explanation
Fig. 1 is the structural representation of the friction-free hydraulic cylinder for primary mirror support of the present invention;
Fig. 2 is that oil hydraulic cylinder of the present invention is unified into the support schematic diagram of oil hydraulic cylinder group realization to primary mirror by oil pipe string;
View when Fig. 3 is oil hydraulic cylinder rest of the present invention;
View when Fig. 4 is hydraulic cylinder works of the present invention.
In figure: 1, upper locking nut, 2, upper diaphragm briquetting, 3, upper support diaphragm, 4, rubber pad, 5, upper cylinder body, 6, upper relief opening, 7, upper outlet valve, 8, lower cylinder body, 9, lower relief opening, 10, lower outlet valve, 11, lower support diaphragm, 12, lower diaphragm follower, 13, lower locking nut, 14, upper piston, 15, upper rolling film, 16, upper film platen, 17, upper oil cavitie, 18, upper hydraulic fluid port, 19, middle piston, 20, middle rolling film, 21, middle film platen, 22, lower hydraulic fluid port, 23, lower oil cavitie, 24, lower film platen, 25, lower rolling film, 26, lower piston, 27, stationary axle, 28, oil pipe, 29, oil hydraulic cylinder group.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, friction-free hydraulic cylinder for primary mirror support of the present invention, whole cylinder body is made up of upper cylinder body 5 and lower cylinder body 8, upper cylinder body 5 and lower cylinder body 8 are set to one, cylinder interior forms cavity, the cylinder body of upper cylinder body 5 leaves relief opening 6 and upper hydraulic fluid port 18, in upper relief opening 6, install outlet valve 7; The cylinder body of lower cylinder body 8 leaves lower relief opening 9 and lower hydraulic fluid port 22, lower outlet valve 10 is installed in lower relief opening 9.
Stationary axle 27 is installed in the central through bore of cylinder body, stationary axle 27 is provided with from top to bottom successively: upper locking nut 1, upper diaphragm briquetting 2, upper support diaphragm 3, upper piston 14, middle piston 19, lower piston 26, lower support diaphragm 11, lower diaphragm follower 12 and lower locking nut 13, these unit Series are formed an overall structure by stationary axle 27 together, and this overall structure can move up and down in central through bore.
Upper support diaphragm 3 edge is fixedly linked by the projective structure of screw and upper cylinder body 5, its center is fixedly linked by screw and upper piston 14, adopt upper diaphragm briquetting 2 to push down support diaphragm 3, and be fixed locking by upper locking nut 1 pair of upper diaphragm briquetting 2, upper support diaphragm 3 and upper piston 14; Lower support diaphragm 11 edge is fixedly linked by the projective structure of screw and lower cylinder body 8, its center is fixedly linked by screw and lower piston 26, adopt lower diaphragm follower 12 to push down lower support diaphragm 11, and by lower locking nut 13, locking is fixed to lower diaphragm follower 12, lower support diaphragm 11 and lower piston 26.
Upper support diaphragm 3 and lower support diaphragm 11 adopt metal to make, its axial rigidity is very little and lateral rigidity is very large, when being fixed on piston and cylinder body, can ensure piston at axial free movement limited piston in the displacement of radial direction, thus the outbound course of control piston, maintain the radial rigidity of piston simultaneously.
Upper piston 14 is provided with flange plate, the external diameter of middle piston 19 is maximum in three pistons, and upper piston 14 is identical with the external diameter of lower piston 26, the setting of upper piston 14, middle piston 19 and lower piston 26 is the installations of conveniently going up rolling film 15, middle rolling film 20 and lower rolling film 25.
Position near upper piston 14 on upper cylinder body 5 is provided with rubber pad 4, and have certain interval between the flange plate of rubber pad 4 and upper piston 14, when oil hydraulic cylinder is in resting state, the flange plate of upper piston 14 falls within rubber pad 4, plays safety supports effect.
Adopt rolling film 15 to seal between upper cylinder body 5 and upper piston 14, upper rolling film 15 is separately fixed on upper cylinder body 5 with on upper piston 14 by upper film platen 16; In adopting between upper cylinder body 5 and middle piston 19, rolling film 20 seals, and middle rolling film 20 is separately fixed on upper cylinder body 5 with on middle piston 19 by middle film platen 21; Lower rolling film 25 is adopted to seal between lower cylinder body 8 and lower piston 26, lower rolling film 25 is separately fixed on the upper and lower piston 26 of lower cylinder body 8 by lower film platen 24, upper cylinder body 5 and lower cylinder body 8 dock the inner chamber closed formed and are separated into two oil pockets by upper rolling film 15, middle rolling film 20 and lower rolling film 25, i.e. upper oil cavitie 17 and lower oil cavitie 23, upper oil cavitie 17 communicates with upper relief opening 6 and upper hydraulic fluid port 18, and lower oil cavitie 23 communicates with lower relief opening 9 and lower hydraulic fluid port 22.
Upper rolling film 15, middle rolling film 20 and lower rolling film 25 are a kind of composite stratified material film, are divided into two-layer, and first layer is the woven layer of terylene or other fibers, and the second layer is nitrile rubber layer or other oil resistant rubber layers; Upper rolling film 15, middle rolling film 20 and lower rolling film 25 are disk-like structure, and very soft, there are installation strumae or fastening flange in thin film disk outer ring, can leave fixed hole or not stay in the middle of thin film disk.
Piston is subject to the oil pressure effect of oil pocket, and piston is more stable, by regulating the oil mass in oil pocket, and can the moving up and down of regulating piston.
As shown in Figure 2, between several oil hydraulic cylinders of connection, form oil hydraulic cylinder group 29 by oil pipe 28, namely form the weight of connecting vessels shared primary mirror; Oil hydraulic cylinder has two kinds of working staties: working state and resting state, as shown in Figure 3, when oil hydraulic cylinder is in resting state, upper oil cavitie 17 is oil-filled, and lower oil cavitie 23 removes oil, upper piston 14 falls, the flange plate of upper piston 14 falls within rubber pad 4, and now oil hydraulic cylinder is no longer connecting vessels, and the weight of primary mirror is born by rubber pad 4, now, oil hydraulic cylinder is in a safe condition; As shown in Figure 4, when oil hydraulic cylinder is in running order, upper oil cavitie 17 removes oil, and lower oil cavitie 23 is oil-filled, and upper piston 14 rises, and the flange plate of upper piston 14 no longer contacts with rubber pad 4.
When oil hydraulic cylinder is used for primary mirror support, mainly utilizes law of connected vessels, multiple oil hydraulic cylinder is composed in series oil hydraulic cylinder group 29 by oil pipe 28, identical with the hydraulic cylinder force in group, with the weight of the several oil hydraulic cylinder shared primary mirrors in group.
Claims (9)
1., for the friction-free hydraulic cylinder of primary mirror support, comprising:
The cylinder body of inner one-tenth cavity;
Be arranged on the hydraulic fluid port on described cylinder body and relief opening;
Be arranged on the stationary axle (27) in the central through bore of described cylinder body;
Be arranged on the upper piston (14) on described stationary axle (27), middle piston (19) and lower piston (26) successively, described upper piston (14) and lower piston (26) are fixedly linked respectively by locking nut and described stationary axle (27), (14) are provided with flange plate to described upper piston, and described middle piston (19) is positioned at the cavity of described cylinder body;
It is characterized in that, also comprise:
Be fixed on described upper piston (14), middle piston (19), rolling film between lower piston (26) and cylinder body respectively by film platen, inner chamber of cylinder block is divided into two oil pockets by described middle piston (19) and rolling film;
Be arranged on the support diaphragm on described upper piston (14) and lower piston (26) respectively by diaphragm follower, described support diaphragm edge is connected with described cylinder body by screw.
2. the friction-free hydraulic cylinder for primary mirror support according to claim 1, is characterized in that,
Described cylinder body comprises upper cylinder body (5) and lower cylinder body (8), described upper cylinder body (5) is provided with relief opening (6) and upper hydraulic fluid port (18); Described lower cylinder body (8) is provided with lower relief opening (9) and lower hydraulic fluid port (22).
3. the friction-free hydraulic cylinder for primary mirror support according to claim 2, is characterized in that,
In described upper relief opening (6), outlet valve (7) is installed; In described lower relief opening (9), lower outlet valve (10) is installed.
4. the friction-free hydraulic cylinder for primary mirror support according to claim 2, is characterized in that,
Described upper cylinder body (5) is provided with rubber pad (4).
5. the friction-free hydraulic cylinder for primary mirror support according to claim 2, is characterized in that,
Adopt rolling film (15) to seal between described upper cylinder body (5) and upper piston (14), described upper rolling film (15) is separately fixed on described upper cylinder body (5) and upper piston (14) by upper film platen (16);
In adopting between described upper cylinder body (5) and middle piston (19), rolling film (20) seals, and described middle rolling film (20) is separately fixed on described upper cylinder body (5) and middle piston (19) by middle film platen (21);
Adopt lower rolling film (25) to seal between described lower cylinder body (8) and lower piston (26), described lower rolling film (25) is separately fixed on described lower cylinder body (8) and lower piston (26) by lower film platen (24).
6. the friction-free hydraulic cylinder for primary mirror support according to claim 1, is characterized in that,
Described upper piston (14) is fixedly linked by upper locking nut (1) and described stationary axle (27); Described lower piston (26) is fixedly linked by lower locking nut (13) and described stationary axle (27).
7. the friction-free hydraulic cylinder for primary mirror support according to claim 1 and 2, is characterized in that,
Described oil pocket comprises upper oil cavitie (17) and lower oil cavitie (23), described upper oil cavitie (17) communicates with upper relief opening (6) and upper hydraulic fluid port (18), and described lower oil cavitie (23) communicates with lower relief opening (9) and lower hydraulic fluid port (22).
8. the friction-free hydraulic cylinder for primary mirror support according to claim 1, is characterized in that,
Described rolling film is disk-like structure, and there are installation strumae or fastening flange in thin film disk outer ring, can arrange or not arrange fixed hole in the middle of thin film disk.
9. the friction-free hydraulic cylinder for primary mirror support according to claim 8, is characterized in that,
Described rolling film adopts composite stratified material to make, and be divided into two-layer, first layer is the woven layer of terylene or other fibers, and the second layer is nitrile rubber layer or other oil resistant rubber layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310037248.0A CN103075384B (en) | 2013-01-30 | 2013-01-30 | Friction-free hydraulic cylinder for primary mirror support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310037248.0A CN103075384B (en) | 2013-01-30 | 2013-01-30 | Friction-free hydraulic cylinder for primary mirror support |
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| CN103075384A CN103075384A (en) | 2013-05-01 |
| CN103075384B true CN103075384B (en) | 2015-02-18 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259635A (en) * | 2015-11-17 | 2016-01-20 | 中国科学院长春光学精密机械与物理研究所 | Whiffletree support structure applied to statically determined support of large-aperture reflector |
| CN105269563A (en) * | 2015-11-30 | 2016-01-27 | 宁波新芝华东环保科技有限公司 | Environment-friendly three-freedom-degree fetching mechanical arm used under dangerous work conditions |
| CN106950690A (en) * | 2017-05-16 | 2017-07-14 | 谢秀娟 | A kind of primary mirror of astronomical telescope hydraulic support device |
| CN107942503B (en) * | 2017-09-13 | 2020-04-21 | 中国科学院国家天文台南京天文光学技术研究所 | Ultra-large telescope height shafting supports and drives hydraulic whiffletree and control airborne system |
| CN109352553A (en) * | 2018-10-19 | 2019-02-19 | 山东中衡光电科技有限公司 | A kind of optical mirror plane spherical surface diaphragm support device |
| CN109630495A (en) * | 2018-10-19 | 2019-04-16 | 中国矿业大学 | A kind of diaphragm support cylinder for large optical mirror processing |
| CN111664133B (en) * | 2020-06-16 | 2022-01-28 | 瑞安市佳和模具有限公司 | Automatic adjustment support suitable for positioning different appearance structures |
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| JPS6124829A (en) * | 1984-07-13 | 1986-02-03 | Aisin Warner Ltd | Annular cylinder of fluid hydraulic actuator in friction engaging clutch |
| JPS6346281B2 (en) * | 1982-10-15 | 1988-09-14 | Fujikura Rubber Works Ltd | |
| CN1598247A (en) * | 2004-07-28 | 2005-03-23 | 马成贵 | Air-hydraulic cylinder with dual function diaphragm |
| JP4038076B2 (en) * | 2002-05-29 | 2008-01-23 | 新キャタピラー三菱株式会社 | Crawler type vehicle |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5594006A (en) * | 1978-10-18 | 1980-07-17 | Lucas Industries Ltd | Master cylinder assembly with booster |
| JPS6346281B2 (en) * | 1982-10-15 | 1988-09-14 | Fujikura Rubber Works Ltd | |
| JPS6124829A (en) * | 1984-07-13 | 1986-02-03 | Aisin Warner Ltd | Annular cylinder of fluid hydraulic actuator in friction engaging clutch |
| JP4038076B2 (en) * | 2002-05-29 | 2008-01-23 | 新キャタピラー三菱株式会社 | Crawler type vehicle |
| CN1598247A (en) * | 2004-07-28 | 2005-03-23 | 马成贵 | Air-hydraulic cylinder with dual function diaphragm |
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