CN102305243B - Self-compensating fluid hydrostatic bearing - Google Patents
Self-compensating fluid hydrostatic bearing Download PDFInfo
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- CN102305243B CN102305243B CN 201110254955 CN201110254955A CN102305243B CN 102305243 B CN102305243 B CN 102305243B CN 201110254955 CN201110254955 CN 201110254955 CN 201110254955 A CN201110254955 A CN 201110254955A CN 102305243 B CN102305243 B CN 102305243B
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Abstract
The invention relates to a self-compensating fluid hydrostatic bearing which comprises a rotor and a bearing sleeve, wherein the bearing sleeve comprises a sleeve body and a cylindrical throttling ring sheathed in the sleeve body; the two end faces of the sleeve body are second conical end faces, and the outer surface of the cylindrical throttling ring is a second cylindrical face which forms an acute angle with the second taper end faces; the rotor comprises a shock insulator and conical bodies respectively arranged on the two ends of the sleeve body, wherein the shock insulator is hollowly sheathed in the cylindrical throttling ring, and an oil storage chamber is formed between the shock insulator and the cylindrical throttling ring; two conical bodies are connected into a whole by the shock insulator, each conical body is provided with a first conical end face, and the inner side of each conical body is provided with a first cylindrical face which forms an acute angle with the first conical end face; the second conical end face or the first conical end face is provided with a bearing oil chamber, and the second cylindrical face or the first cylindrical face is provided with a throttling unit; and the sleeve body is provided with an oil supply hole and an oil drain hole, wherein the oil supply hole is communicated with the oil storage chamber, the oil storage chamber is communicated with the throttling unit by virtue of the end part of the cylindrical throttling ring, the throttling unit is communicated with the bearing oil chamber, and the bearing oil chamber is communicated with the oil drain hole. The bearing provided by the invention has the advantages of simple structure, good throttling effect, good bearing capacity, and high rigidity.
Description
Technical field
The present invention relates to the sliding bearing field, relate in particular to the self-compensating hydrostatic bearing.
Background technique
Three kinds of throttle styles are proposed, fixed restriction, variable restrictor and self compensation throttling in existing hydrostatic pressure (comprising hydrostatic pressure and the gas-static) technology.Orifice restriction device, capillary restrictor, porous restriction device etc. all belong to the fixed restriction device.Adopt the hydrodynamic journal liquid polymers of fixed restriction principle, keeping under the constant prerequisite of charge oil pressure, the flow controller of minor diameter is the main path that improves bearing rigidity with adopting more to reduce throttle clearance, and this class bearing is subject to processing the restriction of level.Variable restrictor is then set about by the flow resistance of flow controller from changing fluid, realize transformable pressure difference by transformable flow resistance, thereby obtain higher rigidity, this class flow controller comprises that elastic capillary pipe flow controller, diaphragm control flow controller, electronic compensation flow controller and flow can divide flow controller etc.But variable restrictor exists the problem of stability, and is improper if parameter is selected, too low such as the rigidity of film, and feedback is undue strong, then easily vibrates; Sensitivity is higher, and then stability is poorer.In order to obtain high rigidity and highi degree of accuracy, the research that some scholars attempt the closed-loop control principle on the numerical control machine tool is applied to hydrodynamic journal liquid polymers comes up, feed back to outside throttling final controlling element with the pressure difference in the control oil pocket by the detection to oil slick thickness, thereby obtained so-called " infinite stiffness ".Yet each oil pocket needs the scheme of corresponding high-precision pressure (or displacement) sensor and throttling final controlling element, so that the cost of this bearing is very expensive, in addition the delay issue between feedback control and the flow controller final controlling element also so that the dynamic characteristic of bearing reduce on the contrary.The self compensation throttling technology does not need to process special flow controller, realizes compensate function by self structure.Yet, traditional self-compensating hydrostatic bearing with throttling unit and corresponding carrying oil pocket positioned opposite on the inwall of a cylindrical shell, and a plurality of throttlings unit arranges with carrying oil pocket space, this just needs the long surface grooves of processing or external channel to connect corresponding throttling unit and carrying oil pocket, because surface grooves or external channel are long, fluid pressure loss is very large, directly causes restriction effect to reduce, and the situation that passage stops up also easily occurs simultaneously.The people such as the Kane of the Massachusetts Institute of Technology propose to adopt mutual acutangulate surface to realize the self compensation mode of throttling, but because throttle clearance is a simple annular connected region, the diffusion effect of its lubricant oil is difficult to avoid, and has affected the bearing integral performance.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, and a kind of simple in structure, good throttle effect, bearing capacity is strong, rigidity is high self-compensating hydrostatic bearing are provided.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of self-compensating hydrostatic bearing, comprise rotor and bearing housing, described bearing housing comprises body and cylindrical restrictor ring, described cylindrical restrictor ring is tightly placed in the described body, the both ends of the surface of described body are the second circular cone end face, and the outer surface of described cylindrical restrictor ring is and acutangulate the second cylndrical surface of described the second circular cone end face;
Described rotor comprises two cones and a dottle pin, described dottle pin is placed in the described cylindrical restrictor ring, form accumulator between described dottle pin and the described cylindrical restrictor ring, described two cones are divided into the two ends of described body, and two cones are connected as a single entity by dottle pin, described cone is provided with the first circular cone end face, and pyramidal inboard is provided with and acutangulate the first cylndrical surface of described the first circular cone end face;
Evenly be provided with a plurality of carrying oil pockets on described the second circular cone end face or on described the first circular cone end face, evenly be provided with a plurality of throttlings unit on described the second cylndrical surface or on described the first cylndrical surface;
Described body is provided with oil supply hole and oil drainage hole, described oil supply hole is communicated with accumulator, described accumulator is communicated with the throttling unit through the end of described cylindrical restrictor ring, and described throttling unit is communicated with the carrying oil pocket through internal oil passages, and described carrying oil pocket is communicated with described oil drainage hole through the oil extraction oil circuit.
Described throttling unit comprises throttleng surface, oil guide slot and oil guiding hole, the end face handing-over of described throttleng surface and described cylindrical restrictor ring, and described oil guide slot is along the periphery setting of throttleng surface, and described oil guiding hole is opened on the described throttleng surface and with described internal oil passages and is communicated with.
Described internal oil passages comprises the first Oil Guide passage that is opened on the described cylindrical restrictor ring, with be opened on the described body and with the second Oil Guide passage of described the first Oil Guide channel connection, described the first Oil Guide passage is communicated with described oil guiding hole, and described the second Oil Guide passage is communicated with described carrying oil pocket.
Described oil extraction oil circuit comprises two draining annular grooves that are opened on the described body and the oil drain passage that the draining annular groove is communicated to oil drainage hole, and described two draining annular grooves are divided into the inside and outside both sides of described carrying oil pocket.
Compared with prior art, the invention has the advantages that:
Self-compensating hydrostatic bearing of the present invention, carrying oil pocket and throttling unit divided be located on the conical surface and cylndrical surface that is mutually acute angle, throttle clearance directly is not communicated with the carrying gap, avoided the diffusion effect of fluid after the throttling, simultaneously, greatly shortened the distance of throttling unit to corresponding carrying oil pocket, the internal oil passages length that is communicated with the two is reduced greatly, can reduce fluid pressure loss, prevent that restriction effect from reducing, and can improve its automatically cleaning ability, avoid occurring the situation that passage stops up.Throttling of the present invention unit is provided with oil guide slot at the throttleng surface periphery, this oil guide slot forms with the end of cylindrical restrictor ring and cooperates, in zone of high pressure such as throttleng surface formation on every side, force through the fluid after the throttling on the one hand and enter internal oil passages from the oil guiding hole on the throttleng surface, on the other hand a plurality of throttling cell isolation are opened, make each throttling unit independent throttle, thereby avoid the diffusion effect of lubricating fluid to affect bearing performance, than existing integral annular throttle clearance, free-standing throttling of the present invention unit has the more stable characteristics of restriction effect, can greatly improve bearing performance.
Description of drawings
Fig. 1 is perspective view of the present invention;
Fig. 2 is plan view of the present invention;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the B-B sectional view of Fig. 2 centre bearer bush;
Fig. 5 is the three-dimensional cutaway view of bearing housing;
Fig. 6 is three-dimensional cutaway view of the present invention;
Fig. 7 is the three-dimensional cutaway view of another embodiment of the present invention rotor part;
Fig. 8 is the three-dimensional cutaway view of stationary part in another embodiment of the present invention.
Each label represents among the figure:
1, rotor; 2, bearing housing; 3, accumulator; 4, oil supply hole; 5, oil drainage hole; 6, carrying oil pocket; 7, throttling unit; 11, cone; 12, dottle pin; 111, the first circular cone end face; 112, the first cylndrical surface; 21, body; 22, cylindrical restrictor ring; 211, the second circular cone end face; 213, the second Oil Guide passage; 214, draining annular groove; 215, oil drain passage; 221, the second cylndrical surface; 223, the first Oil Guide passage; 71, throttleng surface; 72, oil guide slot; 73, oil guiding hole.
Embodiment
Fig. 1 to Fig. 6 shows a kind of self-compensating hydrostatic bearing of the present invention, comprise rotor 1 and bearing housing 2, bearing housing 2 comprises body 21 and cylindrical restrictor ring 22, cylindrical restrictor ring 22 is tightly placed in the body 21, the both ends of the surface of body 21 are the second circular cone end face 211, evenly be provided with a plurality of carrying oil pockets 6 on the second circular cone end face 211, the outer surface of cylindrical restrictor ring 22 is and the second circular cone end face 211 acutangulate the second cylndrical surface 221, evenly be provided with a plurality of throttlings unit 7 on the second cylndrical surface 221, each throttling unit 7 is corresponding one by one with contiguous carrying oil pocket 6; Rotor 1 comprises two cones 11 and a dottle pin 12, dottle pin 12 is placed in the cylindrical restrictor ring 22, form accumulator 3 between dottle pin 12 and the cylindrical restrictor ring 22, two cones 11 are divided into the two ends of body 21, and two cones 11 are connected as a single entity by dottle pin 12, between the end face of cone 11 and cylindrical restrictor ring 22, leave certain interval, cone 11 is provided with the first circular cone end face 111, the inboard of cone 11 is provided with and the first circular cone end face 111 acutangulate the first cylndrical surface 112, form the carrying gap between the first circular cone end face 111 and the second circular cone end face 211, form throttle clearance between the first cylndrical surface 112 and the second cylndrical surface 221; Body 21 is provided with oil supply hole 4 and oil drainage hole 5, oil supply hole 4 is communicated with accumulator 3, accumulator 3 is communicated with throttling unit 7 through the end of cylindrical restrictor ring 22, and throttling unit 7 is communicated with carrying oil pocket 6 through internal oil passages, and carrying oil pocket 6 is communicated with oil drainage hole 5 through the oil extraction oil circuit.Self-compensating hydrostatic bearing of the present invention, carrying oil pocket 6 and throttling unit were located on the conical surface and cylndrical surface that is mutually acute angle in 7 minutes, throttle clearance directly is not communicated with the carrying gap, avoided the diffusion effect of fluid after the throttling, simultaneously, greatly shortened the distance of throttling unit 7 to corresponding carrying oil pocket 6, the internal oil passages length that is communicated with the two is reduced greatly, can reduce fluid pressure loss, prevent that restriction effect from reducing, and can improve its automatically cleaning ability, avoid occurring the situation that passage stops up.
In the present embodiment, throttling unit 7 comprises throttleng surface 71, oil guide slot 72 and oil guiding hole 73, throttleng surface 71 joins with the end face of cylindrical restrictor ring 22, oil guide slot 72 is along the periphery setting of throttleng surface 71, oil guiding hole 73 is opened on the throttleng surface 71 and with internal oil passages and is communicated with, this oil guide slot 72 forms with the end of cylindrical restrictor ring 22 and cooperates, in zone of high pressure such as throttleng surface 71 periphery formation, force through the fluid after the throttling on the one hand and enter internal oil passages from the oil guiding hole 73 on the throttleng surface 71, on the other hand a plurality of throttlings unit 7 is kept apart, make each throttling unit 7 independent throttle, thereby avoid the diffusion effect of lubricating fluid to affect bearing performance, than existing integral annular throttle clearance, free-standing throttling of the present invention unit 7 has the more stable characteristics of restriction effect, can greatly improve bearing performance.
In the present embodiment, internal oil passages comprises the first Oil Guide passage 223 that is opened on the cylindrical restrictor ring 22, with be opened on the body 21 and the second Oil Guide passage 213 that is communicated with the first Oil Guide passage 223, the first Oil Guide passage 223 is communicated with oil guiding hole 73, and the second Oil Guide passage 213 is communicated with carrying oil pocket 6.The oil extraction oil circuit comprises two draining annular grooves 214 being opened on the body 21 and 215, two draining annular grooves 214 of oil drain passage that draining annular groove 214 is communicated to oil drainage hole 5 is divided into the inside and outside both sides of carrying oil pocket 6.
The below is described in further detail the present invention in conjunction with the working principle of self-compensating hydrostatic bearing take hydraulic oil as flowing medium:
Pressure oil enters accumulator 3 by oil supply hole 4, enter each throttling unit 7 through end face and the gap between the cone 11 of cylindrical restrictor ring 22 again, and be full of oil guide slot 72 and throttleng surface 71, end at oil guide slot 72 and cylindrical restrictor ring 22, form higher oil pressure, force the hydraulic oil through throttling to enter internal oil passages from oil guiding hole 73, and be transported to carrying oil pocket 6 through the first Oil Guide passage 223 and the second Oil Guide passage 213, hydraulic oil in the small part oil guide slot 72 leaks to enter and is positioned at inboard draining annular groove 214, hydraulic oil in the carrying oil pocket 6 is from interior, release to draining annular groove 214 outer both sides, the hydraulic oil that enters behind the draining annular groove 214 becomes low pressure oil, and concentrates by oil drain passage 215 and to deliver to oil drainage holes 5 and discharge.
As shown in Figure 3, when to the right radial displacement occured with respect to bearing housing 2 rotor 1, the left side throttle clearance reduced, the carrying gap increases, and restriction effect is strengthened, the pressure decreased in the carrying gap, left side; And the right side throttle clearance increases, the carrying gap reduces, this will so that the pressure in the carrying gap, right side increase, so bearing film automatically produced and ordered about rotor 1 restoring force left, thereby make rotor remain on without acceptance of persons position.Owing to the variation that throttle clearance produces opposite trend along with the variation of carrying the gap, this makes bearing have larger bearing capacity and rigidity so that the more common throttling method of pressure feedback of the interior oil film of bearing is stronger.
As shown in Figure 3, when downward axial displacement occurs with respect to bearing housing 2 in rotor 1, upside carrying gap reduces, so that the pressure in the upside carrying gap increases, downside carrying gap increases, so that the pressure in the downside carrying gap reduces, then produce the restoring force that rotor 1 is made progress in the bearing film, thus can make rotor 1 remain on initial position.In this process, the throttle clearance size is constant, thereby its pressure feedback and common fixed restriction method are equivalent.
As shown in Figure 3, when clockwise deflection occurs with respect to bearing housing 2 in rotor 1, the throttle clearance that is positioned at the upper left corner and the lower right corner reduces, carries the gap and increases, so that the pressure in this carrying gap reduces, and the throttle clearance that is positioned at the lower left corner and the upper right corner increases, the carrying gap reduces, so that the pressure that should carry in the gap increases, so produced in the bearing film rotor 1 anticlockwise restoring moment, make rotor 1 keep initial position.In this process, owing to the variation that throttle clearance produces opposite trend along with the variation of carrying the gap, this makes bearing have larger bearing capacity and rigidity so that the more common throttling method of pressure feedback of the interior oil film of bearing is stronger.
As shown in Figure 7 and Figure 8, in other embodiments, also a plurality of carrying oil pockets 6 evenly can be located on the first circular cone end face 111, a plurality of throttlings unit 7 evenly is located on the first cylndrical surface 112, its working principle is same as the previously described embodiments, and advantage is that carrying oil pocket 6 and the inner passage that is communicated with carrying oil pocket 6 and throttling unit 7 are more prone to processing.
Above-mentioned is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art in the situation that do not break away from the technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all should drop in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment does according to the technology of the present invention essence.
Claims (3)
1. self-compensating hydrostatic bearing, comprise rotor (1) and bearing housing (2), it is characterized in that: described bearing housing (2) comprises body (21) and cylindrical restrictor ring (22), described cylindrical restrictor ring (22) is tightly placed in the described body (21), the both ends of the surface of described body (21) are the second circular cone end face (211), and the outer surface of described cylindrical restrictor ring (22) is and described the second acutangulate the second cylndrical surface of circular cone end face (211) (221);
Described rotor (1) comprises two cones (11) and a dottle pin (12), described dottle pin (12) is placed in the described cylindrical restrictor ring (22), form accumulator (3) between described dottle pin (12) and the described cylindrical restrictor ring (22), described two cones (11) are divided into the two ends of described body (21), and two cones (11) are connected as a single entity by dottle pin (12), described cone (11) is provided with the first circular cone end face (111), and the inboard of cone (11) is provided with and described the first acutangulate the first cylndrical surface of circular cone end face (111) (112);
Described the second circular cone end face (211) upward or on described the first circular cone end face (111) evenly is provided with a plurality of carrying oil pockets (6), and described the second cylndrical surface (221) upward or on described the first cylndrical surface (112) evenly is provided with a plurality of throttlings unit (7);
Described body (21) is provided with oil supply hole (4) and oil drainage hole (5), described oil supply hole (4) is communicated with accumulator (3), described accumulator (3) is communicated with throttling unit (7) through the end of described cylindrical restrictor ring (22), described throttling unit (7) is communicated with carrying oil pocket (6) through internal oil passages, described carrying oil pocket (6) is communicated with described oil drainage hole (5) through the oil extraction oil circuit, described throttling unit (7) comprises throttleng surface (71), oil guide slot (72) and oil guiding hole (73), described throttleng surface (71) joins with the end face of described cylindrical restrictor ring (22), described oil guide slot (72) is along the periphery setting of throttleng surface (71), and described oil guiding hole (73) is opened in described throttleng surface (71) and upward and with described internal oil passages is communicated with.
2. self-compensating hydrostatic bearing according to claim 1, it is characterized in that: described internal oil passages comprises the first Oil Guide passage (223) that is opened on the described cylindrical restrictor ring (22), with be opened in the second Oil Guide passage (213) that described body (21) is upper and be communicated with described the first Oil Guide passage (223), described the first Oil Guide passage (223) is communicated with described oil guiding hole (73), and described the second Oil Guide passage (213) is communicated with described carrying oil pocket (6).
3. self-compensating hydrostatic bearing according to claim 1 and 2, it is characterized in that: described oil extraction oil circuit comprises two the draining annular grooves (214) that are opened on the described body (21) and the oil drain passage (215) that draining annular groove (214) is communicated to oil drainage hole (5), and described two draining annular grooves (214) are divided into the inside and outside both sides of described carrying oil pocket (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110254955 CN102305243B (en) | 2011-08-31 | 2011-08-31 | Self-compensating fluid hydrostatic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110254955 CN102305243B (en) | 2011-08-31 | 2011-08-31 | Self-compensating fluid hydrostatic bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102305243A CN102305243A (en) | 2012-01-04 |
| CN102305243B true CN102305243B (en) | 2013-02-13 |
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| CN 201110254955 Expired - Fee Related CN102305243B (en) | 2011-08-31 | 2011-08-31 | Self-compensating fluid hydrostatic bearing |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5868709B2 (en) * | 2012-01-10 | 2016-02-24 | オイレス工業株式会社 | Static pressure gas bearing device |
| CN102767402A (en) * | 2012-07-04 | 2012-11-07 | 联优机械(常熟)有限公司 | Connecting shaft structure of external work output connection device of turbine expansion engine |
| CN102767401A (en) * | 2012-07-04 | 2012-11-07 | 联优机械(常熟)有限公司 | Rotating shaft bearing mechanism for outer power output device of turbine expansion machine |
| CN103195811B (en) * | 2013-04-28 | 2015-06-10 | 昆明学院 | Novel hollow axial energy-saving hydrostatic bearing |
| CN103286660B (en) * | 2013-06-05 | 2015-12-09 | 上海交通大学 | A kind of large surfaces throttling self compensation ultraprecise fluid pressure turntable |
| TWI597436B (en) * | 2016-03-15 | 2017-09-01 | 財團法人工業技術研究院 | Hydrostatic bearing |
| CN110628572B (en) * | 2019-11-11 | 2023-06-16 | 中国农业科学院兰州畜牧与兽药研究所 | Yak DNA extraction device using hydrostatic bearing capable of adapting to pressure change |
| CN110732887A (en) * | 2019-11-19 | 2020-01-31 | 哈尔滨工业大学 | ultra-precision hydrostatic pressure turntable |
| CN111120513B (en) * | 2020-01-18 | 2022-01-28 | 湖南大学 | Static pressure gas thrust bearing |
| CN114382781B (en) * | 2021-12-03 | 2023-07-21 | 中国建筑股份有限公司 | Large-load high-rigidity plane hydrostatic bearing with deflection freedom degree |
| CN114151445B (en) * | 2021-12-08 | 2023-11-24 | 江苏领臣精密机械有限公司 | Self-feedback hydrostatic universal shaft head and hydrostatic turntable |
| CO2022011441A1 (en) * | 2022-08-13 | 2022-09-20 | Puentes Teodicelo Gomez | Slide bearing with a fluid cushion, with various configurations |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037992C (en) * | 1992-02-12 | 1998-04-08 | 高级工程系统运营及产品公司 | Self-compensating hydrostatic linear motion bearing |
| CN1296633C (en) * | 2004-05-17 | 2007-01-24 | 武汉理工大学 | Self-compensation lubricating sliding bearing |
| US7682082B2 (en) * | 2006-06-13 | 2010-03-23 | Ametek-Precitech, Inc. | Compact surface self-compensated hydrostatic bearings |
| CN200961628Y (en) * | 2006-09-25 | 2007-10-17 | 湖南大学 | Outer gap throttling cavity inner hole type oil return liquid static pressure bearing |
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