The application is the divisional application of following application for a patent for invention:
Summary of the invention
The present invention provides the circular bosses of high-precision vertical table base hydrostatic seal structure, its objective is to improve
The support accuracy of workbench.
To achieve these goals, the technical scheme that the present invention takes is:
The high-precision vertical workbench that the present invention provides, the workbench including base, being arranged on base, phase
The driving wheel of mutual external toothing and driven pulley, described driven pulley is located at the lower section of described workbench, and described driven
Wheel is fixedly and coaxially connected with described workbench;
Described base is provided with the circular bosses raised up, described driven pulley by circular hole be set with described in boss
On platform, and form matched in clearance;It is provided with circumference quiet between the surface that described circular bosses coordinates with described driven pulley
Pumping cavity.
Arranging shallow circular recess on the outer round surface of described circular bosses, described shallow circular recess is interior with driven pulley
Hole surface constitutes described circumference static-pressure oil chamber;Described base is provided with oil duct, by described circumference static-pressure oil chamber with
Workbench hydraulic system connects.
Dome external diameter and driven pulley endoporus leave certain interval, take gap width by design.
On the shoulder horizontal plane of the base at described circular bosses place, if fan-shaped static pressure props up bracer;Described driven pulley
Lower surface prop up bracer with described fan-shaped static pressure and contact;Bracer is propped up with fan-shaped static pressure in the lower surface of described driven pulley
Between one side upward, it is provided with static thrust pumping cavity.
Described fan-shaped static pressure props up bracer one side upward and is provided with fan-shaped shallow grooves, described fan-shaped shallow grooves
With the static thrust pumping cavity described in the lower surface composition of described driven pulley;Described base and described fan-shaped static pressure
Prop up bracer and be provided with oil duct, described circumference static-pressure oil chamber is connected with workbench hydraulic system.
The lower surface of described driven pulley supports block gap with the fan-shaped static pressure on the shoulder face on described base and coordinates,
Gap width is taken by design.
The upper surface of described circular bosses is provided with pressure rings, and described pressure rings is fastenedly connected with circular bosses;Described
The external diameter of pressure rings is more than described circular bosses;
The upper and lower end face of described driven pulley, props up bracer court with the lower surface of described pressure rings and fan-shaped static pressure
On one side, formed matched in clearance;
It is provided with down between described pressure rings and described driven pulley matching surface and presses static-pressure oil chamber.
Driven pulley upper surface forms matched in clearance with the pressure rings lower surface being screwed in base upper surface,
Gap width is taken by design,
Described pressure rings one side down, is provided with the shallow grooves of arc-shaped;The shallow grooves of described arc-shaped
With the pressure static-pressure oil chamber down described in the upper surface composition of driven pulley;Described base and described pressure rings are provided with oil
Road, connects the described static-pressure oil chamber of pressure down with workbench hydraulic system.
The end face of described base is provided with raising up of annular, the footpath that raises up of described annular
To the most coaxial more than the external diameter of fan-shaped hydrostatic support block;The lower surface of described driven pulley is provided with and this projection
Matching form closes groove;Described projection and groove constitute sealing structure.
The lower surface of described workbench uses seam fit structure with the upper surface of described driven pulley;Described
Seam be annular, this seam is coaxial with workbench and diameter is more than the external diameter of described pressure rings.
Described workbench hydraulic system provides the pressure oil of constant flow.
The present invention uses technique scheme, and workbench is shape under upper and lower and radially hydrostatic support power effect
Become the closed type static pressure supporting of high rigidity, high anti-heeling moment;Owing to driven pulley is all to locate in axial, radial direction
Move under the supporting of high pressure oil film, be provided with rotating accuracy rigidity high, high, high vibration resistance, anti-tilting force
Square is strong, simple in construction and the little advantage of staring torque;Fan-shaped hydrostatic support block uses sector structure, at one
Multiple secter pat can be installed on anchor ring, form many oil pockets and support, drastically increase the anti-top of hydrostatic support
Cover the ability of moment, reduce difficulty of processing simultaneously;Static-pressure oil chamber is opened on annulus by pressure rings, facilitates
The installation of closed hydrostatic slideway adjusts with gap;The present invention is especially suitable for high-precision vertical lathe, vertical grinder
And the vertical working main shaft of gear hobbing gear grinding machines and rotary table, its precision order of magnitude some thousandths of millimeter it
In, the needs of the industry development such as Aeronautics and Astronautics, wind-powered electricity generation can be met.
Detailed description of the invention
Below against accompanying drawing, by the description to embodiment, the detailed description of the invention of the present invention is made further
Detailed description, to help those skilled in the art to have completeer to inventive concept, the technical scheme of the present invention
Whole, accurate and deep understanding.
The structure of the present invention as expressed by Fig. 1, for a kind of high precision constant current enclosed pitot-static pressure standing table,
Particularly this workbench bottom surface hydrostatic seal structure.Described standing table includes base 5, is arranged on base
Workbench 1, the driving wheel 4 of mutual external toothing and driven pulley 3 on 5, described driven pulley 3 is located at described work
The lower section of station 1, and described driven pulley 3 is fixedly and coaxially connected with described workbench 1.
Workbench 1 uses high-strength screw 2 to be fastenedly connected with driven pulley 3, by mutually nibbling at its lower surface
The driving wheel 4 closed drives it to rotate, and completes the main motion of workbench 1, on the table clamping workpiece, real
The now machining to workpiece.
In order to solve the problem of prior art existence and overcome its defect, it is achieved improve the support accuracy of workbench
Goal of the invention, 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 raised up, described
Driven pulley 3 by circular hole be set with described in circular bosses 11 on, and form matched in clearance;Described circular bosses 11
It is provided with circumference static-pressure oil chamber 6 between the surface coordinated with described driven pulley 3.
As shown in Figure 4, the outer round surface of described circular bosses 11 arranges shallow circular recess, described annular scrobicula
Groove constitutes described circumference static-pressure oil chamber 6 with the bore area of driven pulley 3;Described base 5 is provided with oil duct, will
Described circumference static-pressure oil chamber 6 connects with workbench hydraulic system.
Driven pulley 3 is sleeved on the circular bosses 11 of base 5, and the external peripheral surface of circular bosses 11 has circle
All static-pressure oil chambers 6, the external diameter of dome platform 11 leaves certain interval with the endoporus of driven pulley 3, and takes by design
Gap width.
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
It is the formation of a floor height force feed film during circumference static-pressure oil chamber 6, by the effect of pressure oil, makes driven pulley 3 exist
Radially suspend, define the radial direction hydrostatic support of high intensity.
As shown in Figure 2:
On the shoulder horizontal plane of the base 5 at described circular bosses 11 place, if fan-shaped static pressure props up bracer 7;Described
The lower surface of driven pulley 3 is propped up bracer 7 with described fan-shaped static pressure and is contacted;The lower surface of described driven pulley 3 and fan
Shape static pressure props up between bracer 7 one side upward, is provided with static thrust pumping cavity 8.
As shown in Figure 4, described fan-shaped static pressure props up bracer 7 one side upward and is provided with fan-shaped shallow grooves, institute
The fan-shaped shallow grooves stated and the static thrust pumping cavity 8 described in the lower surface composition of described driven pulley 3;The described end
Seat 5 and described fan-shaped static pressure prop up bracer 7 and are provided with oil duct, by described circumference static-pressure oil chamber 6 and workbench liquid
Pressure system connectivity.
Bracer 7 gap is propped up with the fan-shaped static pressure on the shoulder face on described base 5 in the lower surface of described driven pulley 3
Coordinate, take gap width by design.
When the pressure oil of the constant flow of workbench hydraulic system offer enters fan-shaped quiet by the fuel feed hole of base 5
When pressure props up the static thrust pumping cavity 8 on bracer 7, under the effect of pressure oil, driven pulley 3 upwards suspends,
Form high intensity axial thrust hydrostatic support.
Fan-shaped static pressure props up bracer 7 and uses sector structure, can install multiple secter pat on an anchor ring,
Form many oil pockets to support, drastically increase the ability of the anti-disturbing moment of hydrostatic support, simplify simultaneously and facilitate
Its processing technology, reduces difficulty of processing.
As shown in Figure 3:
The upper surface of described circular bosses 11 is provided with pressure rings 9, and described pressure rings 9 is with circular bosses 11 fastening even
Connect;The external diameter of described pressure rings 9 is more than described circular bosses 11;
The upper and lower end face of described driven pulley 3, supports with the lower surface of described pressure rings 9 and fan-shaped static pressure
Block 7 one side upward, forms matched in clearance;
Pressure static-pressure oil chamber 10 it is provided with down between described pressure rings 9 and described driven pulley 3 matching surface.
As it is shown in figure 5, the one side that described pressure rings 9 is down, it is provided with the shallow grooves of arc-shaped;Described
The shallow grooves of arc-shaped and the pressure static-pressure oil chamber 10 down described in the upper surface composition of driven pulley 3;Described base 5
It is provided with oil duct with described pressure rings 9, the described static-pressure oil chamber 10 of pressure down is connected with workbench hydraulic system.
The lower surface shape of the upper surface of driven pulley 3 and the pressure rings 9 being screwed on base 5 upper surface
Become matched in clearance, and take gap width by design.
By pressing down static-pressure oil chamber 10 to be arranged in the pressure rings 9 of annular, facilitate the peace of closed hydrostatic slideway
Dress adjusts with gap.
When the pressure oil of the constant flow of workbench hydraulic system offer passes through fuel feed hole, enter in pressure rings 9
During lower pressure static-pressure oil chamber 10, due to the effect of pressure oil, driven pulley 3 receives down the static pressure support force pressed,
Form the hydrostatic support that high intensity axle is pressed downward against.
In sum, the work spindle of the vertical machine that the above-mentioned constant current enclosed pitot-static pressure that the present invention provides supports
With workbench, it is particularly well-suited to high rotating accuracy, high vibration resistance, anti-heeling moment is strong, staring torque is little,
And simple in construction high-precision vertical lathe, vertical grinder and gear hobbing, the working-spindle of grinding machine bed and revolution
Workbench.Its precision order of magnitude, within some thousandths of millimeter, can meet the industry such as Aeronautics and Astronautics, wind-powered electricity generation
The needs of development.
The inner hole sleeve of driven pulley 3, on the oil pocket dome of base 5, forms the matched in clearance of radially hydrostatic bearing;
The lower surface of driven pulley 3 forms the gap of axial thrust hydrostatic support with base 5 dome circular bead surface oil pocket fan block
Coordinate;The upper surface of driven pulley 3 is formed with the oil pocket pressure rings being fixed in base 5 dome upper surface and axially pushes away
The matched in clearance of power 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
High rigidity is defined, the enclosed pitot-static pressure supporting of high anti-heeling moment under the effect of hydrostatic support power.Due to from
Driving wheel 3 is to operate under axial-radial is in the bearing state of high pressure oil film, is provided with high rigidity height antivibration
Property and the high advantage of the little rotating accuracy of staring torque, be particularly well-suited to high accuracy, to resistance to shock and anti-inclination
Grinding machine that torque requirement is high, 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, raising up of described annular
Radially the most coaxial more than the external diameter of fan-shaped hydrostatic support block 7;The lower surface of described driven pulley 3 be provided with
This convex shape matches groove;Described projection and groove constitute sealing structure.
Said structure, it is ensured that from fan-shaped hydrostatic support block 7 and the pressure oil of circumference static-pressure oil chamber 6 leakage, no
Job site can be leaked into from workbench.
As shown in Figure 1, Figure 4 and Figure 5:
The lower surface of described workbench 1 uses seam fit structure with the upper surface of described driven pulley 3;
Described seam is annular, and this seam is coaxial with workbench and diameter is more than the external diameter of described pressure rings 9.
Said structure, it is ensured that press static-pressure oil chamber 10 and the pressure oil of circumference static-pressure oil chamber 6 leakage from down, will not
Job site is leaked into from workbench.
Owing to the present invention is only constituted a set of rotary table by five big parts, take full advantage of static pressure technology
Advanced feature, enormously simplify structure and assembly technology.Its concrete matching requirements are as follows:
1, on the shoulder face of base 5, load onto fan-shaped static pressure prop up bracer 7, and with after screw fastening, repair and scrape sector
Static pressure props up the upper surface of bracer 7, it is ensured that its flatness error is less than 0.01mm;
2, driven pulley 3 is enclosed within the circular bosses 11 of base 5, and makes its lower surface prop up bracer 7 with fan-shaped static pressure
Upper surface is fitted, and measures the distance of upper surface and base 5 end face of driven pulley 3 so that it is quiet equal to twice
Force feed gap;If undesirable, can be with the end face of scraping base 5, until qualified;
3, workbench 1 is installed in the seam of driven pulley 3, and fasten with driven pulley 3 with high-strength screw 2
Connect, i.e. complete the assembling of static pressure rotary worktable;
4, a whole set of rotary table assembled is put on the lathe bed of lathe so that it is engage with driving wheel 4,
And fasten with bolt, load onto static pressure oil circuit, can come into operation.
Above in conjunction with accompanying drawing, the present invention is exemplarily described, it is clear that the present invention implements not by upper
State the restriction of mode, if the various unsubstantialities that the method design that have employed the present invention is carried out with technical scheme
Improvement, or the most improved design by the present invention and technical scheme directly apply to other occasion, all exists
Within protection scope of the present invention.