JPH04243715A - Hydrostatic bearing device - Google Patents
Hydrostatic bearing deviceInfo
- Publication number
- JPH04243715A JPH04243715A JP2046891A JP2046891A JPH04243715A JP H04243715 A JPH04243715 A JP H04243715A JP 2046891 A JP2046891 A JP 2046891A JP 2046891 A JP2046891 A JP 2046891A JP H04243715 A JPH04243715 A JP H04243715A
- Authority
- JP
- Japan
- Prior art keywords
- water
- pressure
- pressure chamber
- unevenness
- pressure water
- 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.)
- Granted
Links
- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 2
- 230000008014 freezing Effects 0.000 abstract description 19
- 238000007710 freezing Methods 0.000 abstract description 19
- 230000006378 damage Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は重量物の移動等に用いら
れる静水圧軸受装置の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in hydrostatic bearing devices used for moving heavy objects.
【０００２】0002
【従来の技術】静圧軸受効果を利用して重量物を移動さ
せる装置が、特公平１−３０７２７号公報等で提案され
ている。2. Description of the Related Art A device for moving a heavy object using a hydrostatic bearing effect has been proposed in Japanese Patent Publication No. 1-30727 and other publications.
【０００３】これは、平滑な摺動面を摺動するパッドと
、摺動面との間に高圧流体を供給し、高圧流体の反力に
より荷重を受け、パッドにかかる負荷を大幅に軽減する
ようにしたもので、パッドは比較的小さな駆動力で移動
させることができるため、重量物の運搬（移動）に好適
である。[0003] This supplies high-pressure fluid between the pad that slides on a smooth sliding surface and the sliding surface, and receives the load due to the reaction force of the high-pressure fluid, greatly reducing the load on the pad. Since the pad can be moved with a relatively small driving force, it is suitable for transporting (moving) heavy objects.
【０００４】0004
【発明が解決しようとする課題】この場合、高圧流体と
して水を利用すると、摺動隙間からの漏れ等があっても
問題がなく、安価で無公害なメリットがあるが、低温（
氷点下）状態においては、水の凍結により装置の利用が
不能になることがある。[Problem to be solved by the invention] In this case, if water is used as the high-pressure fluid, there will be no problem even if there is leakage from the sliding gap, and it has the advantage of being inexpensive and non-polluting.
In conditions (below freezing), the equipment may become unusable due to freezing of water.
【０００５】本発明は低温下での凍結の問題を解決し、
あらゆる条件で安定した作動性を発揮する静水圧軸受装
置を提供することを目的とする。The present invention solves the problem of freezing at low temperatures,
The objective is to provide a hydrostatic bearing device that exhibits stable operability under all conditions.
【０００６】[0006]
【課題を解決するための手段】そこでこの発明は、摺動
面に水圧パッドを介して接触し、水圧パッドと摺動面と
の間に高圧水が導かれる圧力室を区画形成した静水圧軸
受装置において、摺動面の凹凸を検出する凹凸検出手段
と、前記圧力室の高圧水を排出する排出手段と、圧力室
に高圧水を供給する加圧ユニットと、加圧ユニットの高
圧水を暖めるヒータと、加圧ユニットと圧力室とを結ぶ
高圧水の供給管路を開閉する切換弁とを備え、かつ前記
凹凸検出手段が凹凸を検出したときにヒータを作動させ
て温水を圧力室に供給する一方、停止時は切換弁を閉じ
ると共に排出弁を開いて排水する制御手段とを備えた。[Means for Solving the Problems] Therefore, the present invention provides a hydrostatic bearing that contacts a sliding surface via a hydraulic pad and defines a pressure chamber between the hydraulic pad and the sliding surface to which high-pressure water is introduced. The apparatus includes an unevenness detection means for detecting unevenness on a sliding surface, a discharge means for discharging high-pressure water from the pressure chamber, a pressurization unit that supplies high-pressure water to the pressure chamber, and a pressurization unit that warms the high-pressure water of the pressurization unit. The device includes a heater and a switching valve that opens and closes a high-pressure water supply pipe connecting the pressure unit and the pressure chamber, and operates the heater to supply hot water to the pressure chamber when the unevenness detection means detects unevenness. On the other hand, when the system is stopped, the control means closes the switching valve and opens the discharge valve to drain water.
【０００７】[0007]
【作用】したがって、平滑な摺動面に漏れでた水の氷結
で凹凸ができるような低温での作動時には、温水を供給
することにより、配管等を含めて供給水の凍結を防ぎ、
安定した円滑な作動を確保する。また、停止時には完全
に排水するので、停止中に凍結が起きることもなく、支
障なく次の作動が再開できる。[Function] Therefore, when operating at low temperatures where smooth sliding surfaces may become uneven due to freezing of leaking water, supplying hot water prevents the supply water from freezing, including pipes, etc.
Ensure stable and smooth operation. In addition, since the water is completely drained when stopped, freezing does not occur during stoppage, and the next operation can be resumed without any problems.
【０００８】[0008]
【実施例】図１は全体の回路構成を、図２は軸受部の断
面をあらわす。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall circuit configuration, and FIG. 2 shows a cross section of the bearing section.
【０００９】図２において、平滑な摺動面１に沿って移
動する軸受装置は、水圧パッド２の下面に摺動面１に面
して開口する圧力室３が形成される。圧力室３には通口
５から予備室４を経由して高圧水が供給される。予備室
４は図１の加圧ユニット（後述する）と接続し、高圧水
が逆止弁６を通して送り込まれる。この予備室４は本体
部７と水圧パッド２との間に形成される。In FIG. 2, in a bearing device that moves along a smooth sliding surface 1, a pressure chamber 3 that opens toward the sliding surface 1 is formed on the lower surface of a hydraulic pad 2. High-pressure water is supplied to the pressure chamber 3 through a port 5 and a preliminary chamber 4 . The preliminary chamber 4 is connected to a pressurizing unit (described later) shown in FIG. 1, and high-pressure water is fed through the check valve 6. This preliminary chamber 4 is formed between the main body part 7 and the hydraulic pad 2.
【００１０】水圧パッド２の上方環状部８は、本体部７
に形成した環状の凹部（シリンダ部）９に嵌合し、この
シリンダ室１０に導入される圧油により、本体部７が上
下に移動する油圧ジャッキ１１を構成する。The upper annular portion 8 of the hydraulic pad 2 has a main body portion 7.
A hydraulic jack 11 is constructed in which the body part 7 is fitted into an annular recess (cylinder part) 9 formed in the main body 7 and moved up and down by pressure oil introduced into the cylinder chamber 10 .
【００１１】このように構成した軸受装置は、圧力室３
の高圧水の反力により、本体部７の上部に載置した重量
物の荷重の大部分を支えた状態で、図示しない駆動手段
により摺動面１に沿って移動される。The bearing device configured in this way has a pressure chamber 3
The main body part 7 is moved along the sliding surface 1 by a driving means (not shown) while supporting most of the load of the heavy object placed on the upper part of the main body part 7 by the reaction force of the high-pressure water.
【００１２】図１において、前記予備室４に接続する管
路２０は、加圧ユニット２１と高温蒸気供給ユニット２
２とに、それぞれ切換弁２３と２４を介して接続する。
加圧ユニット２１は高圧水を供給するもので、この高圧
水は氷結のおそれのある低温時などヒータ２５によって
暖められる。また、高温蒸気供給ユニット２２は、低温
の作動開始時などに高温蒸気を供給して、管路２０の内
部等の氷結部分を溶かす。これらヒータ２５や高温蒸気
供給ユニット２２は、切換弁２３，２４と共にコントロ
ーラ２６によって作動が制御される。また、コントロー
ラ２６は作動停止時に高圧水の供給回路内から高圧水を
すっかり抜き取るための、排出弁２７の作動も制御する
。In FIG. 1, a pipe line 20 connected to the preliminary chamber 4 is connected to a pressurizing unit 21 and a high temperature steam supply unit 2.
2 through switching valves 23 and 24, respectively. The pressurizing unit 21 supplies high-pressure water, and this high-pressure water is heated by the heater 25 at low temperatures where freezing may occur. Further, the high-temperature steam supply unit 22 supplies high-temperature steam at the start of low-temperature operation, etc., to melt frozen portions inside the pipe line 20 and the like. The operation of the heater 25 and the high-temperature steam supply unit 22 is controlled by a controller 26 along with the switching valves 23 and 24. The controller 26 also controls the operation of a discharge valve 27 for completely removing high pressure water from the high pressure water supply circuit when the operation is stopped.
【００１３】摺動面１の表面に漏れ出た水の氷結を検出
するために、摺動面１の凹凸検出手段として、例えばリ
ミットスイッチなどからなる凹凸検出スイッチ２８が水
圧パッド２の端部等に備えられ、平滑な摺動面１に凹凸
を検出したときは、コントローラ２６が氷結を判断する
。なお、コントローラ２６には同時に加圧ユニット２１
の水温を検出する水温センサ３０からの信号も入力する
。In order to detect freezing of water leaking onto the surface of the sliding surface 1, an unevenness detection switch 28 consisting of, for example, a limit switch is used as a means for detecting irregularities on the sliding surface 1, such as at the end of the hydraulic pad 2. When an unevenness is detected on the smooth sliding surface 1, the controller 26 determines icing. Note that the controller 26 also includes the pressurizing unit 21.
A signal from a water temperature sensor 30 that detects the water temperature is also input.
【００１４】コントローラ２６はこれらに基づいて、後
述するようにして、ヒータ２５や高温蒸気発生ユニット
２１、さらには切換弁２３，２４と排出弁２７の作動を
制御し、低温時にも安定した作動性を確保する。Based on these, the controller 26 controls the operation of the heater 25, the high-temperature steam generation unit 21, the switching valves 23 and 24, and the discharge valve 27, as will be described later, to ensure stable operability even at low temperatures. ensure that
【００１５】前記油圧ジャッキ１１には、油圧ユニット
３２からの圧油が、高さ制御弁３３を介して導入される
。この高さ制御弁３３は本体部７のジャッキアップ高さ
を検出する高さ検出器３４からの信号に基づいて作動し
、所定の高さを維持するように油圧ジャッキ１１に圧油
を送り込む。Pressure oil from a hydraulic unit 32 is introduced into the hydraulic jack 11 via a height control valve 33. This height control valve 33 operates based on a signal from a height detector 34 that detects the jack-up height of the main body 7, and sends pressure oil to the hydraulic jack 11 so as to maintain a predetermined height.
【００１６】次に作用を含めてさらに説明する。[0016] Next, further explanation will be given including the operation.
【００１７】凹凸検出スイッチ２８が摺動面１に凹凸を
検出しているときは、水圧パッド２の摺動隙間から漏れ
出た水が氷結した場合であって、コントローラ２６は氷
結を判断すると、ヒータ２５に通電して加圧ユニット２
１の高圧水を所定の温度まで暖める。なお、水温は水温
センサ３０により測定され、これに基づいて一定温度を
維持するようにヒータ２５の通電が制御される。When the unevenness detection switch 28 detects unevenness on the sliding surface 1, it means that the water leaking from the sliding gap of the hydraulic pad 2 has frozen, and when the controller 26 determines that the water has frozen, The heater 25 is energized and the pressure unit 2
Heat the high-pressure water in Step 1 to a specified temperature. Note that the water temperature is measured by a water temperature sensor 30, and based on this, energization of the heater 25 is controlled to maintain a constant temperature.
【００１８】したがって、圧力室３に供給される高圧水
は、氷結を伴う外部温度に比べたら暖かく、回路内部の
凍結を防ぐことはもとより、水圧パッド２の移動面が氷
結していても、これを溶かしながら摺動させることがで
き、円滑で安定した作動が保証される。Therefore, the high-pressure water supplied to the pressure chamber 3 is warmer than the outside temperature, which is accompanied by freezing, and not only prevents freezing inside the circuit, but also prevents freezing even if the moving surface of the hydraulic pad 2 is frozen. It can be slid while melting, ensuring smooth and stable operation.
【００１９】装置の作動を停止するときは、コントロー
ラ２６からの信号で切換弁２３，２４を閉じ、排出弁２
７を開く。すると回路内の水は全て外部に排水される。
なお、この水抜きを完全に行うために、水抜き用のアク
チュエータ（排水シリンダやポンプなど）を設けてもよ
い。このようにして水抜きをすることにより、作動停止
時の内部凍結や破損を防止することができる。When stopping the operation of the device, the switching valves 23 and 24 are closed by a signal from the controller 26, and the discharge valve 2 is closed.
Open 7. All water in the circuit is then drained to the outside. Note that in order to completely drain this water, an actuator for draining water (such as a drainage cylinder or a pump) may be provided. By draining water in this way, it is possible to prevent internal freezing and damage when the operation is stopped.
【００２０】作動の再開時コントローラ２６は、運転前
に高温蒸気供給ユニット２２を作動させて蒸気を発生さ
せ、同時にヒータ２５に通電して加圧ユニット２１の高
圧水を加熱しておく。切換弁２３を閉じ、切換弁２４を
開くと、管路内に高温蒸気が供給されて内部を暖める。
一定の時間が経過したら、切換弁２４を閉じて切換弁２
３を開く。すると、暖かい水が管路を流れ、水圧パッド
２の圧力室３にまで供給される。When restarting the operation, the controller 26 operates the high-temperature steam supply unit 22 to generate steam before operation, and at the same time supplies electricity to the heater 25 to heat the high-pressure water in the pressurizing unit 21. When the switching valve 23 is closed and the switching valve 24 is opened, high temperature steam is supplied into the pipe line to warm the inside. After a certain period of time has passed, the switching valve 24 is closed and the switching valve 2 is closed.
Open 3. Then, warm water flows through the pipe and is supplied to the pressure chamber 3 of the hydraulic pad 2.
【００２１】このようにして、摺動面１が氷結のおそれ
のある低温時にも、安定した作動が確保され、また、停
止時の凍結も確実に防止できる。[0021] In this way, stable operation is ensured even at low temperatures where the sliding surface 1 is at risk of freezing, and freezing during stoppage can also be reliably prevented.
【００２２】なお、暖められた水が供給されているとき
は、高温蒸気供給ユニット２２の作動は停止させる。Note that while warm water is being supplied, the operation of the high temperature steam supply unit 22 is stopped.
【００２３】凹凸検出スイッチ２８が摺動面１の凹凸を
検出しない常温時は、ヒータ２５による加熱は行わず、
高圧水がそのまま供給され、また、作動の停止時に水抜
きも行わない。At room temperature, when the unevenness detection switch 28 does not detect unevenness on the sliding surface 1, heating by the heater 25 is not performed.
High-pressure water is supplied as is, and water is not drained when operation is stopped.
【００２４】したがって、氷結の恐れのない通常作動時
は、ヒータ２５への不必要な通電を防ぎ、また迅速な作
動の再開が可能となる。[0024] Therefore, during normal operation without fear of freezing, unnecessary energization of the heater 25 can be prevented and operation can be resumed quickly.
【００２５】[0025]
【発明の効果】以上のように本発明によれば、凹凸検出
手段が凹凸を検出したときにヒータを作動させて温水を
圧力室に供給する一方、停止時は切換弁を閉じると共に
排出弁を開いて排水するようにしたので、氷結の恐れの
ある低温時にも、凍結による破壊などの心配もなく、安
定した円滑な作動が確保できるという効果がある。As described above, according to the present invention, when the unevenness detecting means detects unevenness, the heater is operated to supply hot water to the pressure chamber, while when the unevenness detection means is stopped, the switching valve is closed and the discharge valve is closed. Since it opens to drain water, it has the effect of ensuring stable and smooth operation without worrying about destruction due to freezing, even at low temperatures where there is a risk of freezing.
【図１】本発明の実施例を示す回路構成図である。FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention.
【図２】静水圧軸受部の断面図である。FIG. 2 is a sectional view of a hydrostatic bearing section.
１ 摺動面 ２ 水圧パッド ３ 圧力室 ７ 本体部 １１ 油圧ジャッキ ２１ 加圧ユニット ２３ 切換弁 ２４ 切換弁 ２５ ヒータ ２６ コントローラ ２７ 排出弁 ２８ 凹凸検出スイッチ 1 Sliding surface 2 Water pressure pad 3 Pressure chamber 7 Main body 11 Hydraulic jack 21 Pressure unit 23 Switching valve 24 Switching valve 25 Heater 26 Controller 27 Discharge valve 28 Unevenness detection switch
Claims (1)
水圧パッドと摺動面との間に高圧水が導かれる圧力室を
区画形成した静水圧軸受装置において、摺動面の凹凸を
検出する凹凸検出手段と、前記圧力室の高圧水を排出す
る排出手段と、圧力室に高圧水を供給する加圧ユニット
と、加圧ユニットの高圧水を暖めるヒータと、加圧ユニ
ットと圧力室とを結ぶ高圧水の供給管路を開閉する切換
弁とを備え、かつ前記凹凸検出手段が凹凸を検出したと
きにヒータを作動させて温水を圧力室に供給する一方、
停止時は切換弁を閉じると共に排出弁を開いて排水する
制御手段とを備えたことを特徴とする静水圧軸受装置。[Claim 1] Contacting the sliding surface via a hydraulic pad,
In a hydrostatic bearing device in which a pressure chamber into which high-pressure water is introduced is defined between a hydraulic pad and a sliding surface, an unevenness detection means for detecting irregularities on the sliding surface and a discharge for discharging the high-pressure water from the pressure chamber are provided. a pressurizing unit that supplies high-pressure water to the pressure chamber, a heater that warms the high-pressure water of the pressurizing unit, and a switching valve that opens and closes a high-pressure water supply pipe connecting the pressurizing unit and the pressure chamber. , and when the unevenness detecting means detects the unevenness, a heater is operated to supply hot water to the pressure chamber;
A hydrostatic bearing device characterized by comprising a control means that closes a switching valve and opens a discharge valve to drain water when stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2046891A JP2781667B2 (en) | 1991-01-21 | 1991-01-21 | Hydrostatic bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2046891A JP2781667B2 (en) | 1991-01-21 | 1991-01-21 | Hydrostatic bearing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04243715A true JPH04243715A (en) | 1992-08-31 |
| JP2781667B2 JP2781667B2 (en) | 1998-07-30 |
Family
ID=12027931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2046891A Expired - Fee Related JP2781667B2 (en) | 1991-01-21 | 1991-01-21 | Hydrostatic bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2781667B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1854746A1 (en) * | 2006-05-10 | 2007-11-14 | Freyssinet | Fluid cushion support apparatus |
| JP2009195993A (en) * | 2008-02-19 | 2009-09-03 | Okamoto Machine Tool Works Ltd | Surface grinding head system for substrate |
| JP2009195994A (en) * | 2008-02-19 | 2009-09-03 | Okamoto Machine Tool Works Ltd | Work chuck rotary table mechanism |
-
1991
- 1991-01-21 JP JP2046891A patent/JP2781667B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1854746A1 (en) * | 2006-05-10 | 2007-11-14 | Freyssinet | Fluid cushion support apparatus |
| US7661498B2 (en) | 2006-05-10 | 2010-02-16 | Soletanche Freyssinet | Fluid cushion conveyance system |
| JP2009195993A (en) * | 2008-02-19 | 2009-09-03 | Okamoto Machine Tool Works Ltd | Surface grinding head system for substrate |
| JP2009195994A (en) * | 2008-02-19 | 2009-09-03 | Okamoto Machine Tool Works Ltd | Work chuck rotary table mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2781667B2 (en) | 1998-07-30 |
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