The application is the divisional application of following application for a patent for invention:
Content of the invention
The present invention provides the pressure rings of high-precision vertical table base hydrostatic seal structure, its objective is to improve workbench
Support accuracy.
To achieve these goals, the technical scheme that the present invention takes is:
The high-precision vertical workbench that the present invention provides, including base, the workbench being arranged on base, mutual external toothing
Drivewheel and driven pulley, described driven pulley is located at the lower section of described workbench, and described driven pulley is coaxial with described workbench
It is fixedly connected;
Described base is provided with the circular bosses raising up, and described driven pulley is set with described circular bosses by circular hole,
And form gap cooperation;It is provided with circumference static-pressure oil chamber between the surface of described circular bosses and the cooperation of described driven pulley.
Shallow circular recess, the bore area of described shallow circular recess and driven pulley are arranged on the outer round surface of described circular bosses
Constitute described circumference static-pressure oil chamber;Described base is provided with oil duct, by described circumference static-pressure oil chamber with workbench hydraulic system even
Logical.
Dome external diameter and driven pulley endoporus leave certain interval, take gap width by design.
On the shoulder horizontal plane of base that described circular bosses are located, if fan-shaped static pressure support block;The lower end of described driven pulley
Face is contacted with described sector static pressure support block;Between the lower surface of described driven pulley and fan-shaped static pressure support block one side upward,
It is provided with thrust static-pressure oil chamber.
Described fan-shaped static pressure support block one side upward is provided with fan-shaped shallow grooves, described fan-shaped shallow grooves with described
The lower surface of driven pulley constitute described thrust static-pressure oil chamber;Described base and described sector static pressure support block are provided with oil
Road, described circumference static-pressure oil chamber is connected with workbench hydraulic system.
Fan-shaped static pressure on shoulder face on the lower surface of described driven pulley and described base supports block gap cooperation, by design
Take gap width.
The upper surface of described circular bosses is provided with pressure rings, and described pressure rings and circular bosses are fastenedly connected;Described pressure rings
External diameter be more than described circular bosses;
The upper and lower end face of described driven pulley, with the lower surface of described pressure rings and fan-shaped static pressure support block upward one
Face, forms gap cooperation;
It is provided between described pressure rings and described driven pulley matching surface and push static-pressure oil chamber.
Driven pulley upper surface and the pressure rings lower surface formation gap cooperation being screwed in base upper surface, by design
Take gap width,
Described pressure rings one side directed downwardly, is provided with the shallow grooves of arc-shaped;The shallow grooves of described arc-shaped with driven
The upper surface of wheel constitutes and described pushes static-pressure oil chamber;Described base and described pressure rings are provided with oil duct, by described push quiet
Pumping cavity is connected with workbench hydraulic system.
The end face of described base is provided with raising up of annular, and described raising up of annular is radially more than
The external diameter of fan-shaped static pressure support block is simultaneously coaxial;The lower surface of described driven pulley is provided with the groove that matches with this convex shape;
Described projection constitutes sealing structure with groove.
The lower surface of described workbench adopts seam fit structure with the upper surface of described driven pulley;Described seam
For annular, this seam is coaxial with workbench and external diameter with diameter greater than described pressure rings.
Described workbench hydraulic system provides the pressure oil of constant flow.
The present invention adopts technique scheme, and workbench defines height in the presence of upper and lower and radial direction hydrostatic support power
Rigidity, the closed type static pressure supporting of high anti-heeling moment;Because driven pulley is under axial, to be radially in high pressure oil film supporting
Motion, is provided with that rotating accuracy height, high rigidity, high vibration resistance, anti-heeling moment be strong, structure is simple and that staring torque is little is excellent
Point;Fan-shaped static pressure support block adopts sector structure, can install multiple secter pats on an anchor ring, forms many oil pockets and props up
Support, drastically increases the ability of the anti-disturbing moment of hydrostatic support, reduces difficulty of processing simultaneously;Static-pressure oil chamber is opened by pressure rings
On annulus, facilitate the installation of closed hydrostatic slideway and gap adjusts;The present invention is especially suitable for it is high-precision vertical lathe, vertical
The vertical working main shaft of grinding machine and gear hobbing gear grinding machines and rotary table, its precision order of magnitude within some thousandths of millimeter, energy
Meet the needs of the industry developments such as Aeronautics and Astronautics, wind-powered electricity generation.
Specific embodiment
Below against accompanying drawing, by the description to embodiment, the specific embodiment of the present invention is made further details of
Illustrate, to help those skilled in the art to have more complete, accurate and deep reason to the inventive concept of the present invention, technical scheme
Solution.
The structure of the present invention as expressed by Fig. 1, is a kind of high precision constant current enclosed pitot-static pressure standing table, particularly
Its bottom surface hydrostatic seal structure.Described standing table includes base 5, the workbench 1 being arranged on base 5, mutually nibbles outward
The drivewheel 4 closing and driven pulley 3, described driven pulley 3 is located at the lower section of described workbench 1, and described driven pulley 3 and described work
Platform 1 is fixedly and coaxially connected.
Workbench 1 is fastenedly connected with driven pulley 3 using high-strength screw 2 in its lower surface, by intermeshing active
Wheel 4 drives its rotation, completes the main motion of workbench 1, on the table clamping workpiece, realizes the machining to workpiece.
In order to solve the problems, such as prior art and overcome its defect, realize improving the invention of the support accuracy of workbench
Purpose, the technical scheme that the present invention takes is:
As shown in Figure 1:
The high-precision vertical workbench of the present invention, its base 5 is provided with the circular bosses 11 raising up, described driven pulley 3
It is set with described circular bosses 11 by circular hole, and form gap cooperation;The table that described circular bosses 11 are coordinated with described driven pulley 3
It is provided with circumference static-pressure oil chamber 6 between face.
As shown in figure 4, on the outer round surface of described circular bosses 11 arrange shallow circular recess, described shallow circular recess with driven
The bore area of wheel 3 constitutes described circumference static-pressure oil chamber 6;Described base 5 is provided with oil duct, by described circumference static-pressure oil chamber 6 with
Workbench hydraulic system connects.
Driven pulley 3 is sleeved on the circular bosses 11 of base 5, and the external peripheral surface of circular bosses 11 has circumference static-pressure oil chamber
6, the external diameter of dome platform 11 leaves certain interval with the endoporus of driven pulley 3, and takes gap width by design.
When the pressure oil of the constant flow of workbench hydraulic system offer passes through the fuel feed hole of base 5 bottom surface, enter circumference quiet
It is the formation of a floor height force feed film during pumping cavity 6, by the effect of pressure oil, so that driven pulley 3 is diametrically suspended, define height
The radial direction hydrostatic support of intensity.
As shown in Figure 2:
On the shoulder horizontal plane of base 5 that described circular bosses 11 are located, if fan-shaped static pressure support block 7;Described driven pulley 3
Lower surface is contacted with described sector static pressure support block 7;The lower surface of described driven pulley 3 and fan-shaped static pressure support block 7 upward one
Between face, it is provided with thrust static-pressure oil chamber 8.
As shown in figure 4, described fan-shaped static pressure support block 7 one side upward is provided with fan-shaped shallow grooves, described sector
Shallow grooves constitute described thrust static-pressure oil chamber 8 with the lower surface of described driven pulley 3;Described base 5 and described sector static pressure
Support block 7 is provided with oil duct, and described circumference static-pressure oil chamber 6 is connected with workbench hydraulic system.
Fan-shaped static pressure support block 7 gap cooperation on shoulder face on the lower surface of described driven pulley 3 and described base 5, presses
Design takes gap width.
Support when the pressure oil of the constant flow of workbench hydraulic system offer enters fan-shaped static pressure by the fuel feed hole of base 5
During thrust static-pressure oil chamber 8 on block 7, in the presence of pressure oil, driven pulley 3 suspends upwards, forms high intensity axial thrust quiet
Hydraulic support.
Fan-shaped static pressure support block 7 adopts sector structure, can install multiple secter pats on an anchor ring, forms heavy wool
Chamber supports, and drastically increases the ability of the anti-disturbing moment of hydrostatic support, simplifies simultaneously and facilitate its processing technique, reduces processing
Difficulty.
As shown in Figure 3:
The upper surface of described circular bosses 11 is provided with pressure rings 9, and described pressure rings 9 and circular bosses 11 are fastenedly connected;Described
The external diameter of pressure rings 9 is more than described circular bosses 11;
The upper and lower end face of described driven pulley 3, with the lower surface of described pressure rings 9 and fan-shaped static pressure support block 7 upward
Simultaneously, form gap cooperation;
It is provided between described pressure rings 9 and described driven pulley 3 matching surface and push static-pressure oil chamber 10.
As shown in figure 5, described pressure rings 9 one side directed downwardly, it is provided with the shallow grooves of arc-shaped;Described arc-shaped shallow
What groove was described with the upper surface composition of driven pulley 3 pushes static-pressure oil chamber 10;Described base 5 and described pressure rings 9 are provided with oil
Road, the described static-pressure oil chamber 10 that pushes is connected with workbench hydraulic system.
The lower surface formation gap of the upper surface of driven pulley 3 and the pressure rings 9 being screwed on base 5 upper surface is joined
Close, and take gap width by design.
Be arranged on pushing static-pressure oil chamber 10 in the pressure rings 9 of annular, facilitate closed hydrostatic slideway installation and
Gap adjusts.
When the pressure oil of the constant flow of workbench hydraulic system offer passes through fuel feed hole, pushing in entrance pressure rings 9 is quiet
During pumping cavity 10, due to the effect of pressure oil, driven pulley 3 receives the static pressure support force pushing, and forms high intensity and axially pushes
Hydrostatic support.
In sum, the work spindle of vertical machine and work that the above-mentioned constant current enclosed pitot-static pressure that the present invention provides supports
Platform, is particularly well-suited to that high rotating accuracy, high vibration resistance, anti-heeling moment be strong, staring torque is little, and simple high-precision vertical of structure
Formula lathe, vertical grinder and gear hobbing, the working-spindle of grinding machine bed and rotary table.Its precision order of magnitude is in some thousandths of milli
Within rice, the needs of the industry developments such as Aeronautics and Astronautics, wind-powered electricity generation can be met.
The inner hole sleeve of driven pulley 3, on the oil pocket dome of base 5, forms the gap cooperation of radial direction hydrostatic bearing;Driven pulley 3
Lower surface and base 5 dome circular bead surface oil pocket fan the gap cooperation that block forms axial thrust hydrostatic support;The upper end of driven pulley 3
Face and the oil pocket pressure rings being fixed in base 5 dome upper surface form the gap cooperation of axial thrust hydrostatic support.
Now, the upper and lower end face of driven pulley 3 and endoporus are in hydrostatic support, and it is in upper and lower and radial direction hydrostatic support
High rigidity, the enclosed pitot-static pressure supporting of high anti-heeling moment is defined in the presence of power.Because driven pulley 3 is equal in axial-radial
It is under the bearing state of high pressure oil film operating, be provided with the high vibration resistance of high rigidity and high excellent of the little rotating accuracy of staring torque
Point, the grinding machine that be particularly well-suited to high accuracy, with resistance to shock is had high demands with anti-heeling moment, lathe, gear-hobbing machine use.
As shown in Figure 1, Figure 4 and Figure 5:
The end face of described base 5 is provided with raising up of annular, and the radial direction that raises up of described annular is big
Simultaneously coaxial in the external diameter of fan-shaped static pressure support block 7;The lower surface of described driven pulley 3 be provided with match with this convex shape recessed
Groove;Described projection constitutes sealing structure with groove.
Said structure it is ensured that from fan-shaped static pressure support block 7 and circumference static-pressure oil chamber 6 leakage pressure oil, will not be from work
Job site is leaked on platform.
As shown in Figure 1, Figure 4 and Figure 5:
The described lower surface of workbench 1 adopts seam fit structure with the upper surface of described driven pulley 3;Described stops
Mouthful it is annular, this seam is coaxial with workbench and external diameter with diameter greater than described pressure rings 9.
Said structure it is ensured that from push static-pressure oil chamber 10 and circumference static-pressure oil chamber 6 leakage pressure oil, will not be from workbench
On leak into job site.
Because the present invention only constitutes a set of rotary table by five big parts, take full advantage of the advanced spy of static pressure technology
Property, enormously simplify structure and assembly technology.Its specific matching requirements is as follows:
1st, fan-shaped static pressure support block 7 is loaded onto on the shoulder face of base 5, and with, after screw fastening, repairing and scraping fan-shaped static pressure support
The upper surface of block 7 is it is ensured that its flatness error is less than 0.01mm;
2nd, driven pulley 3 is enclosed within the circular bosses 11 of base 5, and makes its lower surface and fan-shaped static pressure support block 7 upper surface patch
Close, the upper surface of measurement driven pulley 3 and the distance of base 5 top surface are so as to be equal to the static pressure oil clearance of twice;If do not meet will
Ask, can be with the top surface of scraping base 5, until qualified;
3rd, workbench 1 is attached in the seam of driven pulley 3, and is fastenedly connected with driven pulley 3 with high-strength screw 2, that is, complete
Become the assembling of static pressure rotary worktable;
4th, a whole set of rotary table assembling is put on the lathe bed of lathe so as to be engaged with drivewheel 4, blending bolt
Fastening, loads onto static pressure oil circuit, you can come into operation.
Above in conjunction with accompanying drawing, the present invention is exemplarily described it is clear that the present invention implements is not subject to aforesaid way
Restriction, as long as employing the improvement of various unsubstantialities that method of the present invention design and technical scheme are carried out, or without changing
Enter and the design of the present invention and technical scheme are directly applied to other occasions, all within protection scope of the present invention.