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CN102777496A - Thickness automatically-compensating device for multi-oil-chamber static pressure oil film, and system thereof - Google Patents

Thickness automatically-compensating device for multi-oil-chamber static pressure oil film, and system thereof Download PDF

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Publication number
CN102777496A
CN102777496A CN2012102828826A CN201210282882A CN102777496A CN 102777496 A CN102777496 A CN 102777496A CN 2012102828826 A CN2012102828826 A CN 2012102828826A CN 201210282882 A CN201210282882 A CN 201210282882A CN 102777496 A CN102777496 A CN 102777496A
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static pressure
oil
piston
chamber
pressure oil
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CN2012102828826A
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CN102777496B (en
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毛俊杰
马文勇
张芹
刘国藩
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Sinovel Wind Group Co Ltd
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Sinovel Wind Group Co Ltd
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Abstract

The invention discloses a thickness automatically-compensating device for a multi-oil-chamber static pressure oil film, and system thereof, wherein the device is composed of a cylinder, and a piston which can move up and down in the cylinder and which is not separated from the cylinder by action of hydraulic oil, wherein an inner cavity which has an opening on the top and depth greater or equal to height of the piston is arranged in the cylinder, and the piston is arranged in the inner cavity; the cylinder is provided with a hydraulic oil supply channel of a closed space formed by communicating the inner cavity or communicating the piston with the inner cavity; a side wall of the cylinder is provided with a static pressure oil supply port; a top surface of the piston is provided with at least one oil chamber closed on a circumference; and a static pressure oil supply channel for communicating the oil chamber with the static pressure oil supply port is arranged in the piston. The piston can axially move up and down and can be not separated from the cylinder by common action of hydraulic oil and static pressure oil to automatically compensate thickness of oil-chamber oil films, thereby ensuring thickness of the multi-oil-chamber oil film is consistent, and loads are distributed uniformly.

Description

Heavy wool chamber static pressure film thickness automatic compensator and system
Technical field
The present invention relates to static pressure oil film technology, especially a kind of heavy wool chamber static pressure film thickness automatic compensator and system.
Background technique
Liquid Static-Press Technique be two can relative movement plane or curved surface between feed pressure oil; Make between two planes or curved surface to produce oil film and separate, in the working procedure, oil film pressure changed with outer year; Under different operating modes, can both guarantee work under state of liquid friction between plane or curved surface.The static pressure technology is widely used in fields such as guide rail, bearing at present.
In the Liquid Static-Press Technique static pressure oil film set up most important; Oil slick thickness is directly connected to the size of sealing oil edge liquid resistance; Remote-effects are to the designing and calculating of fuel delivery, charge oil pressure, pump power and the oil pocket pressure of oil supply system; So in heavy wool chamber static pressure supports, guarantee that the conformity of oil slick thickness is very important.
In the static-pressure system of the heavy wool chamber of routine, as shown in Figure 1, this system is made up of the workpiece of a pair of relative movement; The workpiece that wherein is used to carry is called fixed block 1; The workpiece that is used for imposed load is called rigid load 2, and fixed block 1 inside is provided with oil supply gallery 11, and fixed block 1 end face digs and is provided with a plurality of oil pockets 12 that are communicated with oil supply gallery 11; Oil pocket 12 perisporiums are closed shape to seal a certain amount of static pressure oil up for safekeeping; Fixed block 1 end face contacts with rigid load 2, between rigid load 2 and fixed block 1 end face, forms oil film through in oil supply gallery 11, feeding static pressure oil, and fixed block 1 end face and rigid load 2 bottom surfaces are static pressure oil surface of contact; And the conformity of the oil slick thickness of a plurality of oil pockets receives the influence of many-sided factors such as the machining accuracy, assembly error, behaviour in service of static pressure oil surface of contact, is to guarantee oil slick thickness h 1With oil slick thickness h 2Conformity, normal require processing, assembling, use wearing and tearing, etc. integrating error e very little, even reach micron order; Just machining accuracy, assembly precision, behaviour in service are had higher requirement; Thereby make processing difficulties, manufacturing efficiency low, cost is big, and service cycle is short; Maintenance cost is high, and working life is short.For overcoming difficulties.
Summary of the invention
The present invention provides a kind of static pressure film thickness automatic compensator and system; Be used to overcome defective of the prior art; The conformity of oil slick thickness in the heavy wool chamber static-pressure system that realization static pressure oil surface of contact machining accuracy is low, assembly error big, behaviour in service is abominable relatively, and easy to maintenance, convenient.
Static pressure film thickness automatic compensator provided by the invention, this device by cylinder body with can constitute at the piston that in this cylinder body, moves up and down under the hydraulic oil effect and do not break away from this cylinder body; Be provided with the inner chamber of the uncovered and degree of depth in top more than or equal to depth pistion in the wherein said cylinder body, said piston is located in this inner chamber; Said cylinder body is provided with communication with cavity or is communicated with piston and the hydraulic pressure oil supply gallery of the enclosed space that inner chamber surrounds; Cylinder side wall is provided with the static pressure oil-feed port; Piston-top surface is provided with at least one circumferentially oil pocket of sealing, and internal piston is provided with the static pressure oil supply gallery that is communicated with said oil pocket and static pressure oil-feed port.
Heavy wool provided by the invention chamber static pressure film thickness ACS; This system is used for wind-powered electricity generation unit test stand, comprises splined shaft and spline housing, and said spline housing is a separation structure; Spline housing is made up of axle sleeve and a plurality of oil clot of joining that forms this spline housing tooth, and the said oil clot cross section of joining is fan-shaped; Wherein joining oil clot is above-mentioned heavy wool chamber static pressure oil film automatic compensator.
Static pressure film thickness automatic compensator provided by the invention and system through static pressure oil-feed port fuel feeding in the static pressure oil supply gallery, form oil film through oil pocket between piston-top surface and rigid load; For uniformity and the conformity that guarantees oil film; Simultaneously through hydraulic pressure oil supply gallery fuel feeding in the inner chamber of cylinder body, make piston in inner chamber, move up and down and do not break away from cylinder body, realize the automatic compensation of oil slick thickness; Thereby guarantee the conformity of heavy wool film thickness; Guarantee that load evenly distributes, the conformity of oil slick thickness in the heavy wool chamber static-pressure system that realization static pressure oil surface of contact machining accuracy is low, assembly error big, behaviour in service is abominable relatively, and also easy to maintenance, convenient.
Description of drawings
Fig. 1 is the structural representation of existing technology heavy wool chamber static pressure oil system;
The structural representation of the heavy wool chamber static pressure film thickness automatic compensator that Fig. 2 provides for the embodiment of the invention;
The principle schematic of the heavy wool chamber static pressure film thickness automatic compensator that Fig. 3 provides for the embodiment of the invention.
Embodiment
As shown in Figure 2, present embodiment provides a kind of heavy wool chamber static pressure film thickness automatic compensator, this device by cylinder body 4 with can constitute at the piston 3 that in this cylinder body 4, moves up and down under the hydraulic oil effect and do not break away from this cylinder body 4; Wherein be provided with the inner chamber 41 of the uncovered and degree of depth in top more than or equal to piston 3 height in the cylinder body 4, piston 3 is located in this inner chamber 41; Cylinder body 4 is provided with communication with cavity 41 or is communicated with piston 3 and the hydraulic pressure oil supply gallery 43 of the enclosed space that inner chamber 41 surrounds; Cylinder body 4 sidewalls are provided with static pressure oil-feed port 42; Piston 3 end faces are provided with at least one circumferentially oil pocket 12 of sealing, and piston 3 inside are provided with the static pressure oil supply gallery that is communicated with oil pocket 12 and static pressure oil-feed port 42.As preferred implementation, hydraulic pressure oil supply gallery 43 is located at cylinder body 4 bottoms and is communicated with inner chamber 41, like Fig. 2, shown in Figure 3; In addition, hydraulic pressure oil supply gallery 43 also can be located on the sidewall of cylinder body 4.
Rigid load 2 is the load carriers in the static-pressure system, and when hydraulic oil oil supply system, static pressure oil oil supply system not fuel feeding work the time, rigid load 2 is fitted with cylinder body 4 end faces; When the work of hydraulic oil oil supply system; And static pressure oil oil supply system is idle the time; Hydraulic oil gets into inner chamber 41 along vertical direction of arrow shown in Figure 2 through hydraulic pressure oil supply gallery 43; Rigid load 2 is fitted with the lubricating pad (part of independent bearing is called lubricating pad in static-pressure system, and lubricating pad specifically is made up of oil pocket 12 and sealing oil edge, and sealing oil edge is meant the edge of the circumferential sealing of oil pocket 12) of piston 3; When hydraulic oil oil supply system, static pressure oil oil supply system all proper functioning the time; Static pressure oil gets into static pressure oil-feed port 42 along the horizontal direction of arrow shown in Figure 2; Get into oil pocket 12 through the static pressure oil supply gallery; Rigid load 2 is separated by static pressure oil with the lubricating pad of piston 3 and forms oil film, and the thickness of oil film is h (as shown in Figure 3).
Because the piston in the static pressure film thickness automatic compensator of heavy wool provided by the invention chamber can axially move up and down in inner chamber, can compensate oil slick thickness automatically, the processing in the system, assembling, use wearing and tearing, etc. integrating error be E=H 2-H 1, because of piston can move axially, so, oil slick thickness is consistent is h in automatic compensating error of when work; The error E that allows in the system depends on the structural parameter of system, and according to the different designs of mechanism parameter, EE Error Excepted E can reach the millimeter level, even Centimeter Level; The scheme in the past of solving has been improved the nonuniformity of load distribution greatly owing to processing, assembling, the inconsistent problem of oil slick thickness of using wearing and tearing to cause.
As the preferred implementation of the foregoing description, the static pressure oil supply gallery is made up of to passage 32, crosspassage 33 and annular recess 34 upright, and is upright to connection oil pocket 12 bottoms, passage 32 tops, upright to passage 32 bottoms connection crosspassage 33; Annular recess 34 is communicated with crosspassage 33 and static pressure oil-feed port 42.Convenient processing.
The width of annular recess 34 is greater than the size of static pressure oil-feed port 42 in Vertical direction.All the time can keep being communicated with static pressure oil-feed port 42 guaranteeing in the process that piston moves up and down; And annular recess 34 is set like this, and when hydraulic system was not worked, the bottom surface of piston 3 contacted with the bottom surface of inner chamber of cylinder block 41, and the extreme higher position of annular recess 34 Vertical direction is higher than the extreme lower position of static pressure oil-feed port 42 Vertical direction; And when hydraulic work system and piston 3 moved to the extreme higher position, the extreme lower position of annular recess 34 Vertical direction was lower than the extreme higher position of static pressure oil-feed port 42 Vertical direction, can guarantee that like this static pressure oil supply system can normally move all the time.
On piston 3 bottom surfaces or inner chamber of cylinder block 41 bottoms are provided with at least one groove, and this groove is communicated with hydraulic pressure oil supply gallery 43.Preferably on piston 3 bottom surfaces, be provided with at least one groove 35.The area of contact of hydraulic oil and piston 3 when sinking to the bottom to increase piston, increase acts on the thrust on the piston 3, under the less situation of hydraulic fluid pressure, obtains the thrust that piston 3 is upwards moved in inner chamber 41.
Be provided with Sealing 5 between inner chamber 41 perisporiums and piston 3 perisporiums.Sealing 5 is used for hermetic separation static pressure oil and hydraulic oil.Sealing 5 is located in the seal groove or other possesses in the structure of motive sealing function; Seal groove or the structure that possesses the motive sealing function can be integral with the static pressure piston; Can also be integral with cylinder body, and sealing configuration is not limited to the seal groove form among the figure.Sealing 5 can be O shape circle, reinforced seal or other Sealings.
Preferably, comprise a plurality of independently Sealings, to realize the better seal effect; In the specific embodiment shown in Fig. 2, be provided with Sealing 5 respectively in the upper end portion and the lower end of piston 3, simultaneously, annular recess 34 is arranged between these two Sealings 5, has so both guaranteed the unobstructed of static pressure fuel feeding, has guaranteed sealing again.
Present embodiment also provides a kind of heavy wool chamber static pressure film thickness ACS; This system is used in particular for wind-powered electricity generation unit test stand; Comprise splined shaft and spline housing; Said spline housing is a separation structure, and spline housing is made up of axle sleeve and a plurality of oil clot of joining that forms this spline housing tooth, and the said oil clot cross section of joining is fan-shaped; Wherein joining oil clot is the heavy wool chamber static pressure film thickness automatic compensator of any embodiment.
What should explain at last is: above each embodiment is only in order to explaining technological scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technological scheme of relevant art scheme.

Claims (9)

1. a heavy wool chamber static pressure film thickness automatic compensator is characterized in that, this device by cylinder body with can constitute at the piston that in this cylinder body, moves up and down under the hydraulic oil effect and do not break away from this cylinder body; Be provided with the inner chamber of the uncovered and degree of depth in top more than or equal to depth pistion in the wherein said cylinder body, said piston is located in this inner chamber; Said cylinder body is provided with communication with cavity or is communicated with piston and the hydraulic pressure oil supply gallery of the enclosed space that said inner chamber surrounds; Cylinder side wall is provided with the static pressure oil-feed port; Piston-top surface is provided with at least one circumferentially oil pocket of sealing, and internal piston is provided with the static pressure oil supply gallery that is communicated with said oil pocket and static pressure oil-feed port.
2. heavy wool according to claim 1 chamber static pressure film thickness automatic compensator; It is characterized in that; Said static pressure oil supply gallery is made up of to passage, crosspassage and annular recess upright, stands to be communicated with said oil pocket bottom to the passage top, and is upright to passage bottom connection crosspassage; Annular recess is communicated with crosspassage and static pressure oil-feed port.
3. heavy wool according to claim 2 chamber static pressure film thickness automatic compensator is characterized in that the width of said annular recess is greater than the size of said static pressure oil-feed port Vertical direction.
4. according to claim 2 or 3 described heavy wool chamber static pressure film thickness automatic compensators; It is characterized in that; When piston is in lowest part; The extreme higher position of annular recess Vertical direction is higher than the extreme lower position of static pressure oil-feed port Vertical direction, and when piston was in highest point, the extreme lower position of annular recess Vertical direction was lower than the extreme higher position of static pressure oil-feed port Vertical direction.
5. according to the arbitrary described heavy wool of claim 1-4 chamber static pressure film thickness automatic compensator, it is characterized in that on the said piston bottom surface or inner chamber of cylinder block bottom is provided with at least one groove, this groove is communicated with said hydraulic pressure oil supply gallery.
6. according to the arbitrary described heavy wool of claim 1-5 chamber static pressure film thickness automatic compensator, it is characterized in that, be provided with Sealing between said inner chamber perisporium and the piston perisporium.
7. heavy wool according to claim 6 chamber static pressure film thickness automatic compensator is characterized in that, in the position near piston and underpart Sealing is set respectively.
8. heavy wool according to claim 7 chamber static pressure film thickness automatic compensator is characterized in that, said annular recess is arranged between said two Sealings.
9. heavy wool chamber static pressure film thickness ACS; This system is used for wind-powered electricity generation unit test stand, comprises splined shaft and spline housing, and said spline housing is a separation structure; Spline housing is made up of axle sleeve and a plurality of oil clot of joining that forms this spline housing tooth, and the said oil clot cross section of joining is fan-shaped; The wherein said oil clot of joining is the arbitrary described heavy wool of an aforesaid right requirement 1-8 chamber static pressure oil film automatic compensator.
CN201210282882.6A 2012-08-09 2012-08-09 Many oil pocket static pressure film thickness autocompensation installations and system Active CN102777496B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103692348A (en) * 2013-12-09 2014-04-02 上海机床厂有限公司 Closed static pressure guide rail with static pressure oil film clearance compensation function
CN105626691A (en) * 2016-03-09 2016-06-01 仁兴机械(佛山)有限公司 Piston type liquid plane static pressure oil pad and die-casting machine with same
CN109108670A (en) * 2018-04-27 2019-01-01 湖北工业大学 When a kind of under variable working condition static pressure workbench oil film thickness adjust and control method
CN109668677A (en) * 2017-10-17 2019-04-23 波音公司 Method and apparatus for reducing static pressure measurement error

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1012839A (en) * 1963-05-29 1965-12-08 Schwartzman Everett H Gas lubricated bearing
JPH10169609A (en) * 1996-12-12 1998-06-23 Mitsubishi Heavy Ind Ltd Static pressure bearing for hydraulic servo cylinder
KR20010000690A (en) * 2000-10-13 2001-01-05 김경섭 Hydrostatic bearing of piston
US20010021284A1 (en) * 1999-04-17 2001-09-13 Deckel Maho Seeback Gmbh Hydrostatic bearing device
CN1316603A (en) * 2000-04-03 2001-10-10 速睦喜股份有限公司 Automatic core-adjusting pressing device
CN101087949A (en) * 2004-12-22 2007-12-12 艾罗拉斯有限公司 Piston/cylinder unit
CN101307798A (en) * 2008-06-25 2008-11-19 联塑(杭州)机械有限公司 Piston type hydraulic bearing

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1012839A (en) * 1963-05-29 1965-12-08 Schwartzman Everett H Gas lubricated bearing
JPH10169609A (en) * 1996-12-12 1998-06-23 Mitsubishi Heavy Ind Ltd Static pressure bearing for hydraulic servo cylinder
US20010021284A1 (en) * 1999-04-17 2001-09-13 Deckel Maho Seeback Gmbh Hydrostatic bearing device
CN1316603A (en) * 2000-04-03 2001-10-10 速睦喜股份有限公司 Automatic core-adjusting pressing device
KR20010000690A (en) * 2000-10-13 2001-01-05 김경섭 Hydrostatic bearing of piston
CN101087949A (en) * 2004-12-22 2007-12-12 艾罗拉斯有限公司 Piston/cylinder unit
CN101307798A (en) * 2008-06-25 2008-11-19 联塑(杭州)机械有限公司 Piston type hydraulic bearing

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103692348A (en) * 2013-12-09 2014-04-02 上海机床厂有限公司 Closed static pressure guide rail with static pressure oil film clearance compensation function
CN103692348B (en) * 2013-12-09 2016-11-02 上海机床厂有限公司 Closed hydrostatic slideway with static pressure oil film clearance compensation function
CN105626691A (en) * 2016-03-09 2016-06-01 仁兴机械(佛山)有限公司 Piston type liquid plane static pressure oil pad and die-casting machine with same
CN105626691B (en) * 2016-03-09 2018-05-01 仁兴机械(佛山)有限公司 A kind of die casting machine with piston type liquid plane static pressure oil pad
CN109668677A (en) * 2017-10-17 2019-04-23 波音公司 Method and apparatus for reducing static pressure measurement error
CN109668677B (en) * 2017-10-17 2022-05-13 波音公司 Method and apparatus for reducing static pressure measurement errors
CN109108670A (en) * 2018-04-27 2019-01-01 湖北工业大学 When a kind of under variable working condition static pressure workbench oil film thickness adjust and control method

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