CN101251151A - Bidirectional loading 5-freedom static pressure sphericity bearing - Google Patents
Bidirectional loading 5-freedom static pressure sphericity bearing Download PDFInfo
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- CN101251151A CN101251151A CNA2008100888949A CN200810088894A CN101251151A CN 101251151 A CN101251151 A CN 101251151A CN A2008100888949 A CNA2008100888949 A CN A2008100888949A CN 200810088894 A CN200810088894 A CN 200810088894A CN 101251151 A CN101251151 A CN 101251151A
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Abstract
The invention relates to a hydrostatic spherical hinge connecting gear, in particular to a spherical hinged type bidirectional loaded 5-DOF (Degree of Freedom) hydrostatic spherical bearing for mechanical transmission, which comprises a main shell; an oil-in pressure inlet and an oil-return pressure inlet are arranged on the main shell; the main shell is inside provided with big crescent hemispheres; each big crescent hemisphere is inside provided with a small hemisphere; the outer convex spherical surface of each big crescent hemisphere is matched with the inner concave spherical surface of the main shell to form an inside hydraulic bearing surface; the inner concave spherical surface of each big crescent hemisphere is matched with the outer convex spherical surface of the small hemisphere to form an outside hydraulic bearing surface; a plurality of oil sinks with the same area are symmetrically arranged on the outer convex spherical surfaces of the small hemispheres and the concave spherical surface of the main shell. The bidirectional loaded 5-DOF (Degree of Freedom) hydrostatic spherical bearing of the invention can replace the common mechanical spherical bearing, be applicable for the occasions of multidimensional vibration, fatigue tests, etc, can bear tension and compression loads and has the advantages of non-gap connection, large connecting rigidity, low friction, long life-span, etc.
Description
Technical field
The present invention relates to static pressure spherical linkage bindiny mechanism, be specifically related to a kind of bidirectional loading 5-freedom static pressure sphericity bearing that is used for mechanically operated spherical linkage formula.
Background technique
One of core technology of the high response of exploitation multi-dimensional vibration platform needs to provide a kind of device exactly, its can connect excitation source and vibration table eliminated retrain in, the amplitude of excitation source is passed to vibrating table realistically.This device also should have distinguishing features such as seamless link, the high and low pivoting friction of coupling stiffness, and it is applied in the dynamic response characteristic that vibration table can be effectively improved in the multi-dimensional vibration field.Because high response multi-dimensional vibration is mainly used in military industry field and the development technical difficulty is big, American-European countries China is carried out strict blockade on new techniques always and product blocks.
Summary of the invention
The object of the invention is to provide a kind of high dynamic response characteristic that can satisfy multi-dimensional vibration, have two ball bearing pairs, can bear Tensile or Compressive Loading, have seamless connectivity, big, the low friction of coupling stiffness, the bidirectional loading 5-freedom static pressure sphericity bearing of long service life.
The present invention is achieved in that a kind of bidirectional loading 5-freedom static pressure sphericity bearing, it comprises that a profile is a cylindrical body, two ends, left and right sides inner concave shape becomes the main casing of the concave spherical surface of symmetry, be respectively equipped with oil-feed connecting-tube nozzle and oil return connecting-tube nozzle in the different tangent directions of the cross section at main casing cylinder middle part, in each of main casing, be respectively equipped with big crescent moon hemisphere in the concave spherical surface, be provided with little hemisphere in each big crescent moon hemisphere, mandrel passes little hemisphere respectively, big crescent moon hemisphere and main casing center circular hole, its two ends are by nut check, make little hemisphere, big crescent moon hemisphere and main casing connect together, and big crescent moon hemisphere can be around mandrel deflection several angle; The evagination sphere of big crescent moon hemisphere matches with the interior concave spherical surface of main casing and forms inboard hydraulic support face; Axisymmetric is provided with the identical oil groove of several areas on the concave spherical surface in each of main casing, and each oil groove all is communicated with the oil circuit that main casing is provided with, and is equipped with damper at the oil circuit inlet of each oil groove; The interior concave spherical surface of big crescent moon hemisphere matches with the evagination sphere of little hemisphere and forms outside hydraulic support face; Axisymmetric is provided with the identical oil groove of several areas on the evagination sphere of little hemisphere, and each oil groove all is communicated with the oil circuit that is provided with in the mandrel, is equipped with damper at the oil circuit inlet of each oil groove; Be connected with cover plate on the end face of two big crescent moon hemisphere respectively.
Aforesaid a kind of bidirectional loading 5-freedom static pressure sphericity bearing, its described damper middle part was provided with the damping through hole of oil, damper leading portion outer surface is smooth cylndrical surface, have circular groove on the cylndrical surface, in order to place the O RunddichtringO, damper back segment outer surface is a screw thread, in order to damper is connected in the oil circuit of main casing or little hemisphere.
Aforesaid a kind of bidirectional loading 5-freedom static pressure sphericity bearing is provided with circular groove at main casing concave spherical surface internal surface, and O RunddichtringO and anti-attrition circle are installed in the groove; Also be provided with circular groove at anti-attrition circle front end, circular groove is connected by oil circuit and oil return connecting-tube nozzle.Be provided with 3 road circular grooves on the main casing center cylindrical hole, middle circular groove and mandrel oil circuit are connected, and in the circular groove of its left and right sides seal ring are installed, and are leaked in the conical cavity in order to prevent the pressure oil liquid in the intermediate annular groove.Be provided with 3 road circular grooves on smaller part ball center cylindrical hole, middle circular groove and mandrel oil circuit are connected, and in the circular groove of its left and right sides seal ring are installed, and are leaked in conical cavity and the back of the body chamber in order to prevent the pressure oil liquid in the intermediate annular groove.Be provided with circular groove in big crescent moon hemispherical ends portion, the O RunddichtringO is installed in it, leak in order to the fluid that prevents to carry on the back in the chamber.
Effect of the present invention is:
The alternative common mechanical ball bearing of bidirectional loading 5-freedom static pressure sphericity bearing of the present invention, be applied in occasions such as multi-dimensional vibration and fatigue test, its cardinal principle is to utilize the hydrostatic support technology to form skim high pressure oil film on the revolute pair spherical surface, thereby eliminate the drive gap of link and the frictional force between the solid contact surface, the whole coupling stiffness and the working life of having improved bearing; And common mechanical ball bearing is if improve the pretightening force that coupling stiffness need strengthen the axle that connects two spheres, with the frictional force between the sacrifice sphere is cost, frictional force is crossed the ouput force of conference loss excitation source, and frictional heat can cause the sphere ablation and make the ball bearing life-span low.
The of the present invention pair of spherical static pressure ball bearing of revolute pair, big crescent moon hemisphere inner and outer surface all is smooth spheres, respectively with main casing on concave spherical surface and the protruding sphere on the little hemisphere cooperate, the big crescent moon hemisphere of both sides all can be around the mandrel rotating certain angle, form two and rotate the ball bearing pairs.On the interior concave spherical surface on the evagination sphere on the little hemisphere and the main casing, be arranged with the identical oil groove of several areas, have inside and outside two-layer pressure oil film thereby make each rotate ball bearing pair.Each revolute pair has inside and outside two-layer pressure oil film, thereby has eliminated the joint gap of pivoting friction torque and mechanism; Every layer of oil film axisymmetric is provided with the identical oil suction chamber of several areas, by each oil suction chamber front end serial connection damper pressure conciliation effect, each point is all set up the oil film of stable operation between the ball bearing spherical pair, prevent by the sphere precision is asymmetric etc. between spherical pair that reason causes, one side Mechanical Contact, opposite side is set up the state of oil film.
Of the present invention pair of revolute pair static pressure ball bearing, its topology layout is simple, and its oil circuit design unique distinction is by establishing the fuel feeding that the outer oil films in both sides have been realized on the fuel feeding road in the mandrel.And Seal Design is reasonable, and the sealing means of O RunddichtringO plus-minus grinding ring is adopted in the motive sealing between inboard oil film spherical pair, has reduced the spherical rotation friction torque, and the circular groove that this anti-attrition circle front end is provided with can be realized low pressure seal.On structural design, can externally connect the variation of mechanical interface by the size adaptation of cover plate about changing.
The of the present invention pair of spherical static pressure ball bearing of revolute pair makes driving mechanism have five degrees of freedom, satisfies the spatially decoupled requirement of various multi-dimensional vibrations.Ball bearing is connected high-voltage oil liquid during work, high-voltage oil liquid enters in the oil groove between each sphere by damper, mandrel is subjected to the action of hydraulic force of hydraulic oil in the oil groove, produce resiliently deformable, after hydraulic coupling and the mandrel elastic recovery equilibrium of forces, on the inside and outside spherical surface of each big ball, can form very thin pressure oil film, thus mechanical friction power and the mechanical connection slit between sphere when eliminating big ball and rotating, advantages such as it is big to make ball bearing have the rigidity of transmission, and frictional force is little.
Description of drawings
Fig. 1 bidirectional loading 5-freedom static pressure sphericity bearing perspective view;
Fig. 2 bidirectional loading 5-freedom static pressure sphericity bearing stereochemical structure sectional view;
Fig. 3 is Fig. 1 bidirectional loading 5-freedom static pressure sphericity bearing side view
Fig. 4 is that Fig. 1 bidirectional loading 5-freedom static pressure sphericity bearing is along C-C direction sectional view;
Fig. 5 is that Fig. 1 bidirectional loading 5-freedom static pressure sphericity bearing is along A-A direction sectional view;
Fig. 6 is that Fig. 1 bidirectional loading 5-freedom static pressure sphericity bearing is along D-D direction sectional view;
The tank structure schematic representation that Fig. 7 is provided with for the main casing concave spherical surface;
The tank structure schematic representation that Fig. 8 is provided with for the protruding sphere of little hemisphere;
Among the figure: 1. upper cover plate; 2. big crescent moon hemisphere; 3. little hemisphere; 4. main casing; 5. oil return connecting-tube nozzle; 6. mandrel; 7.O RunddichtringO; 8. anti-attrition circle; 9. lower cover plate; 10. mandrel nut; 11. back of the body chamber; 12. circular groove; 13. damper; 14. conical cavity; 15.O RunddichtringO; 16. oil groove; 17.O RunddichtringO; 18. plug; 19. oil groove; 20. damper; 21. mandrel oil inlet hole; 22. oil-feed connecting-tube nozzle; 23. oilhole; 24. oil circuit; 25. oil circuit; 26. oil circuit.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing bidirectional loading 5-freedom static pressure sphericity bearing of the present invention is further described.
As Fig. 1～shown in Figure 6, bidirectional loading 5-freedom static pressure sphericity bearing of the present invention, it comprises that a profile is a cylindrical body, two ends, left and right sides inner concave shape becomes the main casing 4 of the concave spherical surface of symmetry, be respectively equipped with oil-feed connecting-tube nozzle 22 and oil return connecting-tube nozzle 5 in the different tangent directions of the cross section at main casing 4 cylinders middle part, in each of main casing 4, be respectively equipped with big crescent moon hemisphere 2 in the concave spherical surface, be provided with smaller part ball 3 in each big crescent moon hemisphere 2, mandrel 6 passes smaller part ball 3 respectively, big crescent moon hemisphere 2 and main casing 4 center circular holes, its two ends are by nut 10 lockings, make smaller part ball 3, big crescent moon hemisphere 2 and main casing 4 connect together, and big crescent moon hemisphere 2 can be around mandrel 6 deflection several angles.
The evagination sphere of big crescent moon hemisphere 2 matches with the interior concave spherical surface of main casing 4 and forms inboard hydraulic support face; Axisymmetric is provided with the identical oil groove of several areas 19 on the concave spherical surface in each of main casing 4, and each oil groove 19 all is communicated with the oil circuit 25 that main casing 4 is provided with, and is equipped with damper 20 at the oil circuit inlet of each oil groove;
The interior concave spherical surface of big crescent moon hemisphere 2 matches with the evagination sphere of smaller part ball 3 and forms outside hydraulic support face; Axisymmetric is provided with the identical oil groove of several areas 16 on the evagination sphere of smaller part ball 3, and each oil groove 16 all is communicated with the oil circuit 21 that is provided with in the mandrel 6, is equipped with damper 13 at the oil circuit inlet of each oil groove;
Be connected with upper cover plate 1 and lower cover plate 9 on the end face of two big crescent moon hemisphere 2 respectively; Mandrel 6 two ends can be eliminated matching gap by nut 10 lockings with nut check.
As shown in Figure 4 and Figure 5, described damper 13 or 20 middle parts were provided with the damping through hole of oil, damper leading portion outer surface is smooth cylndrical surface, have circular groove on the cylndrical surface, in order to place the O RunddichtringO, cylndrical surface and seal ring form sealing strip by cooperating with smooth cylinder endoporus on main casing 4 or the smaller part ball 3, and the fluid that flows to oil groove all passes through damping hole.Damper back segment outer surface is a screw thread, in the oil circuit that damper is connected main casing 4 or smaller part ball 3.Damper has pressure compensated effect, and load change causes that oil slick thickness changes during work, by regulating oil suction chamber inner fluid pressure to adapt to the variation of external load.
Be provided with circular groove at main casing 4 concave spherical surface internal surfaces, O RunddichtringO 7 and anti-attrition circle 8 are installed in the groove, in order to the fluid between sealing main casing 4 and the big crescent moon hemisphere 2, befouling environment and peripheral instrument and equipment prevent to leak.Also be provided with circular groove 12 at anti-attrition circle 8 front ends, circular groove 12 is connected by oil circuit 24 and oil return connecting-tube nozzle 5, and this circular groove 12 can be realized low pressure seal.
Be provided with 3 road circular grooves on main casing 4 center cylindrical hole, middle circular groove and mandrel oil circuit 21 are connected, and seal ring 15 is installed in the circular groove of its left and right sides, are leaked in the conical cavity 14 in order to prevent the pressure oil liquid in the intermediate annular groove.
Be provided with 3 road circular grooves on smaller part ball 3 center cylindrical hole, middle circular groove and mandrel oil circuit 21 are connected, and in the circular groove of its left and right sides seal ring are installed, and are leaked in conical cavity 14 and the back of the body chamber 11 in order to prevent the pressure oil liquid in the intermediate annular groove.
Be provided with circular groove in big crescent moon hemisphere 2 ends, O RunddichtringO 17 is installed in it, leak in order to prevent the fluid of carrying on the back in the chamber 11.
The of the present invention pair of spherical static pressure ball bearing of revolute pair, pressure oil liquid enters main casing 4 by oil-feed connecting-tube nozzle 22 during work, and oil circuit is divided into two-way.As shown in Figure 5 and Figure 6, high-pressure and hydraulic oil is by oil-feed connecting-tube nozzle 22, oil circuit 25, respectively in damper 20 enters the oil groove 19 of main casing 4 both sides, all fluid is via the sphere slit between main casing 4 and the big crescent moon hemisphere 2, one the tunnel through the sphere slit, circular groove 12, oil circuit 24 connect with oil return connecting-tube nozzle 5, the one tunnel through the sphere slit, conical cavity 14, oil circuit 26 connect with oil return connecting-tube nozzle 5.As Fig. 4 and shown in Figure 6, high-pressure and hydraulic oil is by oil-feed connecting-tube nozzle 22, mandrel oil inlet hole 21, respectively in damper 13 enters the oil groove 16 of smaller part ball 3, after by the sphere slit between smaller part ball 4 and the big crescent moon hemisphere 2, one the tunnel in the sphere slit arrives back of the body chamber 11, arrive conical cavity 14, a tunnel through oilhole 23 and arrive conical cavity 14 through the sphere slit, conical cavity 14 is connected by oil circuit 26 and oil return connecting-tube nozzle 5.
The of the present invention pair of spherical static pressure ball bearing of revolute pair, pressure oil liquid enters main casing 4 by oil-feed connecting-tube nozzle 22 during work, oil circuit is divided into two-way, one tunnel damper 20 on main casing 4 enters 19 li in the oil groove of the recessed ball in main casing both sides, another road is oil circuit mandrel oil inlet hole 21 in mandrel, damper 13 enters in the oil groove 16 of both sides smaller part ball 3, because the damping function in sphere slit, in inside and outside four layers of oil groove, be full of pressure oil liquid, after it overcomes mandrel 6 pretightening forces, make mandrel 6 produce resiliently deformable, in the big crescent moon hemisphere 2 of both sides, form complete oil film after the stable state on the ectosphere surface, the elastic recovery equilibrium of forces of hydraulic support force and mandrel, thereby the mechanical friction power when having eliminated big crescent moon hemisphere 2 and rotating, eliminate sphere and connected the slit, it is big to make bearing have rigidity, frictional force is little, characteristics such as long working life, the link that connects excitation source and table top as multi-dimensional vibration, satisfy spatially decoupled requirement, to the high rigidity requirement of bearing, be one of the crucial solution route of high response multi-dimensional vibration and key technology when satisfying high respond vibration.
Claims (6)
1. bidirectional loading 5-freedom static pressure sphericity bearing, it comprises that a profile is a cylindrical body, two ends, left and right sides inner concave shape becomes the main casing (4) of the concave spherical surface of symmetry, be respectively equipped with oil-feed connecting-tube nozzle (22) and oil return connecting-tube nozzle (5) in the different tangent directions of the cross section at main casing (4) cylinder middle part, in each of main casing (4), be respectively equipped with big crescent moon hemisphere (2) in the concave spherical surface, be provided with little hemisphere (3) in each big crescent moon hemisphere (2), mandrel (6) passes little hemisphere (3) respectively, big crescent moon hemisphere (2) and main casing (4) center circular hole, its two ends are by nut (10) locking, make little hemisphere (3), big crescent moon hemisphere (2) and main casing (4) connect together, and big crescent moon hemisphere (2) can be around mandrel (6) deflection several angle; It is characterized in that:
The evagination sphere of big crescent moon hemisphere (2) matches with the interior concave spherical surface of main casing (4) and forms inboard hydraulic support face; Axisymmetric is provided with the identical oil groove of several areas (19) on the concave spherical surface in each of main casing (4), and each oil groove (19) all is communicated with the oil circuit (25) that main casing (4) is provided with, and is equipped with damper (20) at the oil circuit inlet of each oil groove;
The interior concave spherical surface of big crescent moon hemisphere (2) matches with the evagination sphere of little hemisphere (3) and forms outside hydraulic support face; Axisymmetric is provided with the identical oil groove of several areas (16) on the evagination sphere of little hemisphere (3), and each oil groove (16) all is communicated with the oil circuit (21) that is provided with in the mandrel (6), is equipped with damper (13) at the oil circuit inlet of each oil groove;
Be connected with cover plate (1 and 9) on the end face of two big crescent moon hemisphere (2) respectively.
2. a kind of bidirectional loading 5-freedom static pressure sphericity bearing according to claim 1, it is characterized in that: described damper (13 or 20) middle part was provided with the damping through hole of oil, damper leading portion outer surface is smooth cylndrical surface, have circular groove on the cylndrical surface, in order to place the O RunddichtringO, damper back segment outer surface is a screw thread, in the oil circuit that damper is connected main casing (4) or little hemisphere (3).
3. a kind of bidirectional loading 5-freedom static pressure sphericity bearing according to claim 1 and 2 is characterized in that: be provided with circular groove at main casing (4) concave spherical surface internal surface, O RunddichtringO (7) and anti-attrition circle (8) are installed in the groove; Also be provided with circular groove (12) at anti-attrition circle (8) front end, circular groove (12) is connected by oil circuit (24) and oil return connecting-tube nozzle (5).
4. a kind of bidirectional loading 5-freedom static pressure sphericity bearing according to claim 1 and 2, it is characterized in that: on main casing (4) center cylindrical hole, be provided with 3 road circular grooves, middle circular groove and mandrel oil circuit (21) are connected, seal ring (15) is installed in the circular groove of its left and right sides, is leaked in the conical cavity (14) in order to prevent the pressure oil liquid in the intermediate annular groove.
5. a kind of bidirectional loading 5-freedom static pressure sphericity bearing according to claim 1 and 2, it is characterized in that: on little hemisphere (3) center cylindrical hole, be provided with 3 road circular grooves, middle circular groove and mandrel oil circuit (21) are connected, in the circular groove of its left and right sides seal ring is installed, is leaked in conical cavity (14) and the back of the body chamber (11) in order to prevent the pressure oil liquid in the intermediate annular groove.
6. a kind of bidirectional loading 5-freedom static pressure sphericity bearing according to claim 1 and 2 is characterized in that: be provided with circular groove in big crescent moon hemisphere (2) end, O RunddichtringO (17) is installed in it, leak in order to prevent the fluid of carrying on the back in the chamber (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810088894A CN100578029C (en) | 2008-04-03 | 2008-04-03 | Bidirectional loading 5-freedom static pressure sphericity bearing |
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| CN200810088894A CN100578029C (en) | 2008-04-03 | 2008-04-03 | Bidirectional loading 5-freedom static pressure sphericity bearing |
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| CN101251151A true CN101251151A (en) | 2008-08-27 |
| CN100578029C CN100578029C (en) | 2010-01-06 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429967B (en) * | 2008-12-19 | 2010-09-15 | 北京天高智机技术开发公司 | Three-freedom double-layer oil film type spherical hinge |
| CN102359491A (en) * | 2011-09-01 | 2012-02-22 | 张瑞杰 | Double-ball floating shaft structure |
| CN105275974A (en) * | 2015-11-20 | 2016-01-27 | 上海卫星装备研究所 | Static-pressure supporting and decoupling device for multi-axis vibration test system |
| CN108119545A (en) * | 2017-12-22 | 2018-06-05 | 上海理工大学 | A kind of static pressure hemisphere bearing |
| CN108561536A (en) * | 2018-05-10 | 2018-09-21 | 上海理工大学 | A kind of high-precision motor device and precision equipment |
| CN108591274A (en) * | 2018-05-10 | 2018-09-28 | 上海理工大学 | A kind of sealing device and precision equipment |
-
2008
- 2008-04-03 CN CN200810088894A patent/CN100578029C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429967B (en) * | 2008-12-19 | 2010-09-15 | 北京天高智机技术开发公司 | Three-freedom double-layer oil film type spherical hinge |
| CN102359491A (en) * | 2011-09-01 | 2012-02-22 | 张瑞杰 | Double-ball floating shaft structure |
| CN105275974A (en) * | 2015-11-20 | 2016-01-27 | 上海卫星装备研究所 | Static-pressure supporting and decoupling device for multi-axis vibration test system |
| CN105275974B (en) * | 2015-11-20 | 2018-07-03 | 上海卫星装备研究所 | Multi-axes vibration test system static pressure supports decoupling device |
| CN108119545A (en) * | 2017-12-22 | 2018-06-05 | 上海理工大学 | A kind of static pressure hemisphere bearing |
| CN108561536A (en) * | 2018-05-10 | 2018-09-21 | 上海理工大学 | A kind of high-precision motor device and precision equipment |
| CN108591274A (en) * | 2018-05-10 | 2018-09-28 | 上海理工大学 | A kind of sealing device and precision equipment |
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| Publication number | Publication date |
|---|---|
| CN100578029C (en) | 2010-01-06 |
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Application publication date: 20080827 Assignee: Beijing Experimental Plant Assignor: Beijing Research Institute of Precise Mechatronic Controls Contract record no.: 2013990000425 Denomination of invention: Bidirectional loading 5-freedom static pressure sphericity bearing Granted publication date: 20100106 License type: Exclusive License Record date: 20130723 |
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