CN102777496B - Many oil pocket static pressure film thickness autocompensation installations and system - Google Patents

Many oil pocket static pressure film thickness autocompensation installations and system Download PDF

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Publication number
CN102777496B
CN102777496B CN201210282882.6A CN201210282882A CN102777496B CN 102777496 B CN102777496 B CN 102777496B CN 201210282882 A CN201210282882 A CN 201210282882A CN 102777496 B CN102777496 B CN 102777496B
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China
Prior art keywords
oil
static pressure
piston
cylinder
film thickness
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CN201210282882.6A
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CN102777496A (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 kind of many oil pocket static pressure film thickness autocompensation installations and system, the device is by cylinder body and can be moved up and down under hydraulic oil effect in the cylinder body and not depart from the piston of the cylinder body and constitutes;Top opening is provided with wherein described cylinder body and depth is more than or equal to the inner chamber of depth pistion, the piston is located in the inner chamber;The hydraulic pressure oil supply gallery for the closing space that inner chamber or connection piston are surrounded with inner chamber is communicated with the cylinder body, cylinder side wall is provided with static pressure oil-feed port, piston-top surface is provided with least one circumferentially closed oil pocket, and internal piston is communicated with the static pressure oil supply gallery of the oil pocket and static pressure oil-feed port.Under the collective effect of hydraulic oil and static pressure oil, piston can carry out axial up and down motion and not depart from cylinder body, realize the automatic compensation of oil pocket oil film thickness, so as to ensure the uniformity of many oil pocket oil film thicknesses, it is ensured that uniform load is distributed.

Description

Many oil pocket static pressure film thickness autocompensation installations and system
Technical field
The present invention relates to static pressure oil film technology, especially a kind of many oil pocket static pressure film thickness autocompensation installations and it is System.
Background technology
Liquid Static-Press Technique is to be capable of between the plane of relative motion or curved surface to be passed through pressure oil at two, makes two planes or song Oil film is produced between face and is separated, and in the course of work, oil film pressure changes and change with outer carry, and under different operating modes, can ensure Worked between plane or curved surface under state of liquid friction.Current static pressure technology is widely used in the fields such as guide rail, bearing.
Static pressure oil film sets up most important in Liquid Static-Press Technique, and oil film thickness is directly connected to the big of sealing oil edge liquid resistance Small, the design that fuel delivery, charge oil pressure, pump power and the oil pocket pressure of oil supply system are had influence on indirectly is calculated, so in heavy wool In the support of chamber static pressure, it is ensured that the uniformity of oil film thickness is very important.
In conventional many oil pocket static-pressure systems, as shown in figure 1, the system is made up of the workpiece of a pair of relative motions, its In the workpiece that is used to carry be referred to as fixture 1, the workpiece for imposed load is referred to as rigid load 2, and the inside of fixture 1 is provided with supplying Oily passage 11, the top surface of fixture 1 digs multiple oil pockets 12 connected with oil supply gallery 11, and the perisporium of oil pocket 12 is in closed to seal Deposit a certain amount of static pressure oil, the top surface of fixture 1 is contacted with rigid load 2, by be passed through into oil supply gallery 11 static pressure it is oily and Oil film is formed between rigid load 2 and the top surface of fixture 1, the top surface of fixture 1 and the bottom surface of rigid load 2 are the oily contact surface of static pressure, And the uniformity of the oil film thickness of multiple oil pockets is multi-party by machining accuracy, rigging error, the behaviour in service of the oily contact surface of static pressure etc. The influence of face factor, to ensure oil film thickness h1With oil film thickness h2Uniformity, often require processing, assembling, using abrasion, etc. Cumulative errors e very littles, even up to micron order, just propose higher requirement to machining accuracy, assembly precision, behaviour in service, So that processing difficulties, low production efficiency, cost are big, maintenance cycle is short, and maintenance cost is high, and service life is short.It is tired to overcome It is difficult.
The content of the invention
The present invention provides a kind of static pressure film thickness autocompensation installation and system, for overcoming of the prior art lack Fall into, realize that the oily contact surface machining accuracy of static pressure is low, rigging error is big, oil in many oil pocket static-pressure systems of behaviour in service rather harsh The uniformity of film thickness, and it is easy to maintenance, conveniently.
The static pressure film thickness autocompensation installation that the present invention is provided, the device by cylinder body and can hydraulic oil effect under The piston for being moved up and down in the cylinder body and not departing from the cylinder body is constituted;Top opening is provided with wherein described cylinder body and depth is more than Or equal to the inner chamber of depth pistion, the piston is located in the inner chamber;Be communicated with the cylinder body inner chamber or connection piston with The hydraulic pressure oil supply gallery for the closing space that inner chamber is surrounded, cylinder side wall is provided with static pressure oil-feed port, and piston-top surface is provided with least one Individual circumferentially closed oil pocket, internal piston is communicated with the static pressure oil supply gallery of the oil pocket and static pressure oil-feed port.
Many oil pocket static pressure film thickness self compensating systems that the present invention is provided, the system is used for Wind turbines testing stand, Including splined shaft and spline housing, the spline housing is isolating construction, and spline housing is by axle sleeve and multiple forms matching somebody with somebody for the spline housing tooth Oil clot is constituted, and described is in sector with oil clot cross section;It is above-mentioned many oil pocket static pressure oil film autocompensation installations wherein with oil clot.
Static pressure film thickness autocompensation installation and system that the present invention is provided, through static pressure oil-feed port to static pressure oil supply gallery Interior fuel feeding, oil film is formed by oil pocket between piston-top surface and rigid load, in order to ensure the uniformity and uniformity of oil film, Simultaneously through hydraulic pressure oil supply gallery into the inner chamber of cylinder body fuel feeding so that piston moves up and down and does not depart from cylinder body in the lumen, real The automatic compensation of existing oil film thickness, so as to ensure the uniformity of many oil film thicknesses, it is ensured that uniform load is distributed, and realizes that static pressure oil connects Contacting surface machining accuracy is low, rigging error is big, in many oil pocket static-pressure systems of behaviour in service rather harsh oil film thickness uniformity, And it is easy to maintenance, conveniently.
Brief description of the drawings
Fig. 1 is the structural representation of many oil pocket static pressure oil systems of prior art;
Fig. 2 is the structural representation of many oil pocket static pressure film thickness autocompensation installations provided in an embodiment of the present invention;
Fig. 3 is the principle schematic of many oil pocket static pressure film thickness autocompensation installations provided in an embodiment of the present invention.
Embodiment
As shown in Fig. 2 the present embodiment provides a kind of many oil pocket static pressure film thickness autocompensation installations, the device is by cylinder body 4 and it can be moved up and down under hydraulic oil effect in the cylinder body 4 and not depart from the cylinder body 4 piston 3 and constitute;Wherein in cylinder body 4 Provided with top is open and depth is more than or equal to the inner chamber 41 of the height of piston 3, piston 3 is located in the inner chamber 41;Cylinder body 4 is provided with The hydraulic pressure oil supply gallery 43 for the closing space that communication with cavity 41 or connection piston 3 are surrounded with inner chamber 41, the side wall of cylinder body 4 is provided with static pressure Oil-feed port 42, the top surface of piston 3 is provided with least one circumferentially closed oil pocket 12, be communicated with inside piston 3 oil pocket 12 with it is quiet Press the static pressure oil supply gallery of oil-feed port 42.Preferably, hydraulic pressure oil supply gallery 43 is located at the bottom of cylinder body 4 and and inner chamber 41 connections, as shown in Figure 2 and Figure 3;In addition, hydraulic pressure oil supply gallery 43 may be alternatively provided on the side wall of cylinder body 4.
Rigid load 2 is the load carrier in static-pressure system, when hydraulic oil oil supply system, the oily oil supply system of static pressure are not supplied When oil work, rigid load 2 is fitted with the top surface of cylinder body 4;When the work of hydraulic oil oil supply system, and the oily oil supply system of static pressure is not When work, longitudinal direction of arrow shown in hydraulic oil along Fig. 2 enters inner chamber 41, rigid load by hydraulic pressure oil supply gallery 43 2 with the lubricating pad of piston 3(The part of independent bearing is referred to as lubricating pad in static-pressure system, and lubricating pad is specifically by oil pocket 12 and sealing oil edge structure Into sealing oil edge refers to the circumferentially closed edge of oil pocket 12)Laminating;When hydraulic oil oil supply system, the oily oil supply system of static pressure all just Often when work, horizontal arrow direction of the static pressure oil shown in Fig. 2 enters static pressure oil-feed port 42, enters through static pressure oil supply gallery Oil pocket 12, 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).
Piston in many oil pocket static pressure film thickness autocompensation installations provided due to the present invention can be in interior intracavitary axial direction Move up and down, can compensate automatically processing in oil film thickness, system, assembling, using abrasion, etc. cumulative errors be E=H2-H1, because Piston is axially movable, so operationally automatic compensation error, is consistent oil film thickness for h;The mistake allowed in system Poor E depends on the structural parameters of system, according to the different designs of mechanism parameter, it is allowed to which error E can reach grade, or even centimetre Level;Solve conventional scheme due to processing, assembling, the oil film thickness caused using abrasion is inconsistent the problem of, substantially improve The inhomogeneities of load distribution.
As the preferred embodiment of above-described embodiment, static pressure oil supply gallery is from standing to passage 32, interconnection 33 and ring Shape groove 34 is constituted, and is stood to the top of passage 32 connection oil pocket 12 bottom, is stood to the bottom of passage 32 and connect interconnection 33;Ring-type is recessed Groove 34 connects interconnection 33 and static pressure oil-feed port 42.Convenient processing.
The width of annular recess 34 is more than size of the static pressure oil-feed port 42 in vertical direction.To ensure to move up and down in piston During all the time can with static pressure oil-feed port 42 keep connect;And annular recess 34 is so set, when hydraulic system does not work When, the bottom surface of piston 3 is contacted with the bottom surface of inner chamber of cylinder block 41, and the extreme higher position of the vertical direction of annular recess 34 is than static pressure fuel feeding The extreme lower position of 42 vertical direction of mouth is higher;And when hydraulic work system and when piston 3 moves to extreme higher position, annular recess The extreme lower position of 34 vertical direction is lower than the extreme higher position of the vertical direction of static pressure oil-feed port 42, so may insure that static pressure is supplied Oil system can normally be run all the time.
On the bottom surface of the piston 3 or bottom of inner chamber of cylinder block 41 is provided with least one groove, and the groove connects with hydraulic pressure oil supply gallery 43 It is logical.It is preferred that being provided with least one groove 35 on the bottom surface of piston 3.To increase the contact surface of hydraulic oil and piston 3 when piston is sunk to the bottom Product, thrust of the increasing action on piston 3, piston 3 can be made in inner chamber 41 by being obtained in the case of hydraulic fluid pressure is less The thrust moved up.
Seal 5 is provided between the perisporium of inner chamber 41 and the perisporium of piston 3.Seal 5 is used for hermetic separation static pressure oil and hydraulic pressure Oil.Seal 5 be located in seal groove or other structures for possessing dynamic sealing function in, seal groove or possess dynamic sealing function Structure can make integral with static pressure piston, can also and cylinder body make integral, and sealing structure be not limited to it is close in figure Sealing groove form.Seal 5 can be O-ring, reinforced seal or other seals.
Preferably, including multiple independent seals, to realize preferable sealing effectiveness;In the specific implementation shown in Fig. 2 In example, seal 5 is respectively provided with the upper and lower end of piston 3, meanwhile, it is close that annular recess 34 is arranged on the two Between sealing 5, the unobstructed of static pressure fuel feeding had so both been ensure that, sealing is in turn ensure that.
The present embodiment also provides a kind of many oil pocket static pressure film thickness self compensating systems, and the system is used in particular for wind turbine Group testing stand, including splined shaft and spline housing, the spline housing is isolating construction, and spline housing is by axle sleeve and multiple forms the spline Being constituted with oil clot for tooth is covered, described is in sector with oil clot cross section;Wherein with many oil pocket static pressure oil of the oil clot for any embodiment Film thickness autocompensation installation.
Finally it should be noted that:Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations;To the greatest extent The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that:Its according to The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered Row equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims (6)

1. a kind of many oil pocket static pressure film thickness autocompensation installations, it is characterised in that the device is by cylinder body and can be in hydraulic oil The piston for being moved up and down under effect in the cylinder body and not departing from the cylinder body is constituted;In wherein described cylinder body provided with top it is open and Depth is more than or equal to the inner chamber of depth pistion, and the piston is located in the inner chamber;Inner chamber or company are communicated with the cylinder body The hydraulic pressure oil supply gallery for the closing space that logical piston is surrounded with the inner chamber, cylinder side wall is provided with static pressure oil-feed port, piston-top surface At least one circumferentially closed oil pocket is provided with, the static pressure fuel feeding that internal piston is communicated with the oil pocket and static pressure oil-feed port leads to Road;
The static pressure oil supply gallery is constituted from standing to passage, interconnection and annular recess, is stood to passage top and is connected the oil Bottom of chamber end, stands to passage bottom and connects interconnection;Annular recess connects interconnection and static pressure oil-feed port;
The width of the annular recess is more than the size of the static pressure oil-feed port vertical direction;
When the piston is in lowest part, the extreme higher position of annular recess vertical direction is than static pressure oil-feed port vertical direction Extreme lower position is higher, and when piston is in highest point, the extreme lower position of annular recess vertical direction is than static pressure oil-feed port The extreme higher position of vertical direction is lower.
2. many oil pocket static pressure film thickness autocompensation installations according to claim 1, it is characterised in that the piston bottom On face or inner chamber of cylinder block bottom is provided with least one groove, and the groove is connected with the hydraulic pressure oil supply gallery.
3. many oil pocket static pressure film thickness autocompensation installations according to claim 1 or 2, it is characterised in that in described Seal is provided between chamber perisporium and piston perisporium.
4. many oil pocket static pressure film thickness autocompensation installations according to claim 3, it is characterised in that respectively close The position of piston upper end and bottom sets seal.
5. many oil pocket static pressure film thickness autocompensation installations according to claim 4, it is characterised in that the ring-type is recessed Groove is arranged between two seals.
6. a kind of many oil pocket static pressure film thickness self compensating systems, the system is used for Wind turbines testing stand, including splined shaft And spline housing, the spline housing is isolating construction, and spline housing is by axle sleeve and multiple forms being constituted with oil clot for the spline housing tooth, institute State with oil clot cross section in sector;Wherein described is any described many oil pocket static pressure oil films of the claims 1-5 with oil clot Thickness autocompensation installation.
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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Publication number Priority date Publication date Assignee Title
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
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
US10807735B2 (en) * 2017-10-17 2020-10-20 The Boeing Company Methods and apparatus to reduce static pressure measuring error
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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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
DE19917516A1 (en) * 1999-04-17 2000-11-16 Deckel Maho Seebach Gmbh Hydrostatic storage device
JP4547652B2 (en) * 2000-04-03 2010-09-22 Smc株式会社 Automatic alignment pressing device
KR20010000690A (en) * 2000-10-13 2001-01-05 김경섭 Hydrostatic bearing of piston
DE102004061940A1 (en) * 2004-12-22 2006-07-06 Aerolas Gmbh, Aerostatische Lager- Lasertechnik Piston-cylinder-unit for use in compressor, has fluid storage provided between piston and cylinder and formed by fluid discharged from discharging nozzles into storage opening under pressure
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