CN209130046U - Hydrostatic bearing main shaft mould group - Google Patents
Hydrostatic bearing main shaft mould group Download PDFInfo
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- CN209130046U CN209130046U CN201821793622.4U CN201821793622U CN209130046U CN 209130046 U CN209130046 U CN 209130046U CN 201821793622 U CN201821793622 U CN 201821793622U CN 209130046 U CN209130046 U CN 209130046U
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- hydrostatic bearing
- main shaft
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- fluid
- mould group
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Abstract
The utility model is a kind of hydrostatic bearing main shaft mould group, it is in installing a set of cartridge type main shaft in the spindle box of various machine tool, the ontology of this sleeve-type main shaft is a casing that processing is integrally formed with steel alloy, rear and front end processes two sections of each four ring-like radial hydrostatic bearings with 90 degree of equal parts respectively inside this alloy sleeve, so that axle center is worn.In addition casing rear end is equipped with two groups of symmetrical axial thrust hydrostatic bearings.Several pressure accumulation slots are installed inside two sections of ring-like radial hydrostatic bearings and two groups of axial thrust hydrostatic bearings, and each pressure accumulation slot is connect with a fluid restrictor by independent flow passage respectively, which then controls with external oil pressure oil supply system and connect；And the utility model have many advantages, such as high-precision, high rigidity, high-bearing capacity, installation it is easy, easy to maintenance, without wearing away, hot temperature rise being effectively reduced, Main Shaft Service Life can be significantly increased.
Description
Technical field
The utility model is a kind of bearing, including radial direction and axial bearing, particularly relates to a kind of hydrostatic bearing main shaft
Mould group.
Background technique
For various conventional grinding machine and other related work boards, due to traditional Bearing formula bearing (such as ball axis
Hold) and working-spindle between still combined in a manner of contact, therefore working-spindle for a long time run at high speed under, be easy because rubbing
It wipes and generates high fever, heat some is transferred to bearing, and another part can then be transferred to main shaft, when the two is all generated because of temperature rise
When the case where thermal expansion, the situation that working-spindle is killed will result in, not only therefore working-spindle and bearing can damage, to whole
Other periphery correlation parts of body board will also result in influence.
In recent years, due to the promotion of industrial technology, various utility model hydrodynamic bearing or so-called dynamic and static pressure are (mixed
Pressure) bearing is used in successively on various grinding machine and other machine-tools.But such dynamic pressure or hybrid journal bear are due to must still rotate
After generating wedge type effect to certain speed, axle center is just able to maintain suspension, therefore in the moment of starting and closing, main shaft and bearing
It is still contact-type frictional, although the lubrication of more oil product can reduce the abrasion of part, under prolonged working order, still
A degree of frictional heat energy can be generated, furthermore, it is atomic small to have one between this kind of dynamic pressure or hybrid journal bear and working-spindle
Gap (a few micrometers) so that film distribution between working-spindle and bearing, but this minim gap be easy user operate one section
After time, the dynamic pressure effect originally designed can cause extremely unstable shape because of operating temperature caused by different temperature rises
After condition, such as working-spindle operating a period of time, shuts down one and restart again after the meeting, the workpiece size precision ground or processed
It can be deviated.
In addition hydrodynamic bearing or dynamic and hydrostatic bearing main shaft used in current industry, it is most still based on box typed structure,
Namely before and after hollow spindle box, copper (the material is soft the easy processing) bearing shell of each installation one, but such structure is not easy by adding
Work mode controls the concentricity of two bearing shell of front and back, therefore stability of the axle center in dynamic rotary also can be because of the bad situation of concentricity
And it has a greatly reduced quality.In addition, industry also develops different types of hydrostatic pressure bearing in recent years, but its machining state is still only suitable for
It, can not be simultaneously in the processing situation (such as last fine grinding or polishing process together in processing procedure) of light load, light grinding, light cut
Light, heavy cut task is taken into account, therefore is applying the upper limitation for still having its certain；It can be seen that the above-mentioned article commonly used still has
Many missings, not an excellent designer, still there is quite big improved space.
Inventor commonly uses the missing of items derived from traditional bearing in view of above-mentioned, is making great efforts to think deeply various solutions
And it is subject to experimental verification, cause this hydrostatic bearing main shaft mould group to be born eventually.
Utility model content
First purpose of the utility model is, reduces the working-spindle number of components of conventional grinding machine and related work board
Amount, and then simplify assembly program, the working hour of assembly program can be more reduced, while reaching effect easy to maintenance；
Second purpose of the utility model be, reduce heat transfer between spindle drum, and then promotes axle center when operating
Stability, and reduce the frictional heat that axle center is generated by running.
The utility model provides a kind of hydrostatic bearing main shaft mould group, in installing a set of cartridge type master in the spindle drum of board
The casing of axis, this sleeve-type main shaft is manufactured using the steel of low heat conduction coefficient, this inside pipe casing rear and front end processes respectively
Two sections of each four ring-like radial hydrostatic bearings with 90 degree of equal parts, so that axle center is worn.In addition casing rear end is equipped with two groups pairs
The axial thrust hydrostatic bearing of title.Installing is several inside two sections of ring-like radial hydrostatic bearings and two groups of axial thrust hydrostatic bearings
Pressure accumulation slot, and each pressure accumulation slot is connect with a fluid restrictor by independent flow passage respectively, each fluid restrictor then with outside
The control connection of oil pressure oil supply system；
The high-pressure fluid that the fluid restrictor is sent out pressure supply system carries out pressure conversion, generates height after forming pressure drop
Damping, and this high-pressure fluid is full of each pressure accumulation slot, each ring-like radial hydrostatic bearing and axial thrust hydrostatic bearing
An enclosed high pressure oil film area is just formed with the gap in the axle center, and this high pressure oil film can coat the axle center and it is made to be suspended in this
It is rotated in the gap of each ring-like radial hydrostatic bearing and axial thrust bearing.
And the utility model hydrostatic bearing main shaft mould group, the more traditional Bearing formula main shaft of correlated parts are greatly decreased,
The assembling of each component is finished as long as being loaded onto group, then telescopic hydrostatic spindle is put into the spindle drum, opposite can reduce peace
Dress program simultaneously saves working hour, while having the advantages that easy to maintenance；
And the low thermal conductivity coefficient of the casing can effectively reduce with the heat transfer between the spindle drum, and two sections before and after the casing
Due to being to be integrally formed processing, concentricity can be kept by sleeve outer as machining benchmark ring-like radial hydrostatic bearing
Certain precision, therefore lasting accuracy of the axle center when dynamic operates can be promoted；
The ring-like radial hydrostatic bearing and axial thrust hydrostatic bearing are integrally formed by the steel of low heat conduction coefficient again
The person of being process compared to other dynamic pressures or mixes so they also have the characteristic for slowing down the heat transfer between axis of rotation simultaneously
The copper bearing shell that last item is held, the thermal expansion coefficient of copper is higher compared with steel, is also therefore easier to generate thermal expansion because of temperature rise, and makes
At the stuck of bearing shell and axle center.
The fluid restrictor is a compound design, while having the high rigidity and capillary restrictor of diaphragm type flow controller
Micro volume the advantages that, by will high-pressure fluid carry out pressure conversion after be formed by high pressure oil film, can axle center is stable and
It is accurately suspended in center, even if fluid restrictor can also play high rigidity effect, right under the non-rotary stationary state of bearing
Knife is acted before the processing of machine-tool, is benefited with greatest, also with respect to the precision that can improve processing.Furthermore this fluid
Flow controller has the function of active self-compensating, that is, meets with different cutting impedances simultaneously, pair corresponding to impedance
Claim the fluid restrictor of the other end when sensing pressure difference situation of change, that is, understands immediate response from main modulation Fluid pressure, because
This can make the design can correspond to various harsh processing environments and condition.Axle center can be made to maintain the accurate fortune of high out of roundness simultaneously
Turn, and by the non-contact condition achieved that suspends, frictional heat can be greatly reduced, more can ensure that the service life and essence of main shaft
Degree.
Detailed description of the invention
Fig. 1 is cross-sectional view of the utility model in a preferred embodiment.
Fig. 2 is perspective view of the utility model in a preferred embodiment.
Fig. 3 is the utility model in the cross-sectional view at another visual angle.
Specific embodiment
The utility model hydrostatic bearing main shaft mould group, embodiment is as shown in Figure 1, Figure 2 and Figure 3, is assembled in a tool master
On the board (not shown) of axle bed 1, it includes:
One telescopic hydrostatic spindle 2, is installed in the spindle drum 1, and the ontology of the telescopic hydrostatic spindle 2 is with one
The casing 3 of processing is integrally formed with steel alloy, which processes two sections each four respectively with 90 degree etc.
The ring-like radial hydrostatic bearing 4 divided, so that an axle center 8 is worn.In addition 3 rear end of casing is equipped with two groups of symmetrical axial thrust static pressure
Bearing 5.Several pressure accumulation slots 6 are installed inside this two sections ring-like radial hydrostatic bearings 4 and two groups of axial thrust hydrostatic bearings 5, and should
Each pressure accumulation slot 6 is connect with a fluid restrictor 7 by independent flow passage respectively, each fluid restrictor 7 then with external oil pressure fuel feeding
System control connection.Each fluid restrictor 7 can be in casing 3.
After axle center 8 is arranged in two sections of ring-like radial hydrostatic bearings 4, high-pressure fluid by 7 turns of the fluid restrictor
After changing, which is sent by other independent flow passage, is made full of fluid in each pressure accumulation slot 6, this fluid can be in pressure accumulation
An enclosed high pressure oil film is formed between slot 6 and the gap in axle center 8, and this high pressure oil film coats the axle center 8 and it is made to be suspended in this respectively
High speed rotation is carried out in ring-like radial hydrostatic bearing 4 and the gap of axial thrust hydrostatic bearing 5, and this fluid can be gas or liquid
Body.
From the foregoing it will be appreciated that the telescopic hydrostatic spindle 2 is assembled in this in the utility model hydrostatic bearing main shaft mould group
In spindle drum 1, thus it is quite convenient when assembling, it, can phase as long as after the completion of correlated parts are assembled, being packed into spindle drum 1
To reduction installation procedure to save the time, and it is also quite convenient when maintenance, as long as after splitting out telescopic hydrostatic spindle 2, i.e.,
Identical spare unit can be packed at once immediately, the production line of client can be made not interrupt.
And the casing 3 of processing should be integrally formed with steel alloy, it is made by the material of low heat conduction coefficient, so thermal energy is not
The book of Changes by the casing 3 carry out heat transfer, can be effectively reduced with the heat transfer between the spindle drum 1, effectively inhibit thermal energy by the set
The conduction of pipe 3 influences board to the spindle drum 1, or prevents the thermal energy of board from conducting so far Hydrostatic last item by the spindle drum 1
It holds in main shaft mould group 2, and then influences the actuation in axle center 8；
Also, this two sections ring-like radial hydrostatic bearings 4 to be integrally formed processing with same casing 3 due to obtaining, this two
The ring-like radial hydrostatic bearing 4 of section is arranged coaxial, and the concentricity precision of the ring-like radial hydrostatic bearing 4 thus can be improved, make the axis
The heart 8 is more stable when rotating in this two sections ring-like radial hydrostatic bearings 4；
In addition, since this two sections ring-like radial hydrostatic bearings 4 and the symmetrical axial thrust hydrostatic bearing 5 in two groups of rear end are all
The alloy steel products of low heat conduction coefficient, it is possible to which the heat obstructed between the axle center 8 using the characteristic of its low thermal conductivity is passed
It leads；
The fluid restrictor 7 of each ring-like radial hydrostatic bearing 4 and pressure accumulation slot 6 in axial thrust hydrostatic bearing 5 can be certainly
I monitors all radial directions and axial pressure change, and self adjustment compensates immediately, and axle center 8 is made to maintain the essence of high out of roundness
Close operating, and be not easy to generate with ring-like radial hydrostatic bearing 4 and axial thrust hydrostatic bearing 5 to rub and lead to temperature rise, it more can be true
Protect the service life and precision of this telescopic hydrostatic spindle 2.
And the utility model hydrostatic bearing main shaft mould group and the aforementioned conventional master spindle commonly used are in comparison, under having more
Column advantage:
Due to the utility model can make the axle center 8 by high-pressure fluid membrane suspension in the ring-like radial hydrostatic bearing 4 and
In axial thrust hydrostatic bearing 5, therefore the axle center 8 and the ring-like radial hydrostatic bearing 4 and axial thrust hydrostatic bearing 5 are each other not
Frictional heat can be generated, hot temperature rise can be greatly reduced, reduce thermal deformation, therefore no matter shut down after long time running and rerun, or
Environment temperature difference, all will not influence machining accuracy, more can effectively improve the quality and precision of workpieces processing.
No matter the utility model all uses hydrostatic bearing mould group due to bearing type axially or radially, therefore is real
The product of pitot-static pressure bearing, also represents its internal rotating member and fixing piece is 100% non-contact.Its precision and stability are non-
General dynamic pressure or hybrid journal bear are comparable.
The utility model due to being monitored with each fluid restrictor 7 to the pressure in each pressure accumulation slot 6, and immediately into
Chamber pressure is compensated and adjusted automatically in row, controls the Fluid pressure in each pressure accumulation slot 6 to cooperate various light, heavy cut processing shapes
Condition, even if under the loading condition of heavy cut, more excellent processing quality when also can reach than traditional bearing spindle processing.
The primary structure therein of the utility model hydrostatic bearing main shaft mould group 2 is the casing 3 of ontology, is one with reality
Heart alloy steel products impose the fine structure for being integrally formed processing and going out, therefore its two sections of crucial ring-like 4 energy of radial hydrostatic bearing
High-accuracy concentricity is enough kept, this point is also the important key technology of Ultra-precision Turning.Have the main shaft of high concentricity configuration only,
High-precision processing out of roundness can be brought up.
The construction feature and other utility model mesh of the utility model can be understood really to make to be familiar with this technology operator
And effect, hereby enumerate above-mentioned old specific embodiment and institute's accompanying drawings cooperated to be described in detail, only selected implementation
Example is for this case purposes of discussion, and this case is still otherwise implemented, therefore those skilled in the art is not departing from the utility model
Under creation spirit, Fan Yiben illustrates and other change aspects for making, can all be covered by this case claim, special
And it gives and indicating.
In conclusion the utility model is a kind of hydrostatic bearing main shaft mould group, in the main shaft of various machine tool
The a set of cartridge type main shaft of installing in case, the ontology of this sleeve-type main shaft are a casing that processing is integrally formed with steel alloy, this alloy
Inside pipe casing rear and front end processes two sections of each four ring-like radial hydrostatic bearings with 90 degree of equal parts respectively, so that axle center is worn
If.In addition casing rear end is equipped with two groups of symmetrical axial thrust hydrostatic bearings.Two sections of ring-like radial hydrostatic bearings and two groups of axis
Several pressure accumulation slots are installed inside to thrust hydrostatic bearing, and each pressure accumulation slot is connected with a fluid restrictor by independent flow passage respectively
It connects, which then controls with external oil pressure oil supply system and connect；And the utility model have high-precision, high rigidity,
High-bearing capacity, installation it is easy, easy to maintenance, without wearing away, hot temperature rise being effectively reduced, it is excellent that Main Shaft Service Life etc. can be significantly increased
Point；
Learn that the utility model meets really with industry utilizability, novelty and progressive by above-mentioned, whence is in accordance with the law
It proposes utility application, requests and give examination and grant quasi patent early, true feeling moral is just.
Claims (4)
1. a kind of hydrostatic bearing main shaft mould group, it is characterised in that: it can be assembled in the spindle drum of a board, include:
Sleeve is integrally formed processing by the alloy steel products of low heat conduction coefficient；And
Two sections of ring-like radial hydrostatic bearings and axial thrust hydrostatic bearing are located at the rear and front end of casing, and the ring-like diameter
Install several pressure accumulation slots into hydrostatic bearing and axial thrust hydrostatic bearing, each pressure accumulation slot again respectively with single independent flow passage with
One fluid restrictor is connected, which then controls with external oil pressure oil supply system and connect.
2. hydrostatic bearing main shaft mould group as described in claim 1, it is characterised in that: each ring-like radial hydrostatic bearing with
Pressure accumulation slot is connected by fluid restrictor and external oil supply system control in axial thrust hydrostatic bearing.
3. hydrostatic bearing main shaft mould group as described in claim 1, it is characterised in that: be arranged in two sections of rings with an axle center
In type radial hydrostatic bearing, and high-pressure fluid is sent into each pressure accumulation slot by each fluid restrictor through each runner, makes fluid
It is flow to the gap of each ring-like radial hydrostatic bearing and axial thrust hydrostatic bearing and the axle center, and then forms an enclosed high pressure stream
Body thin film.
4. hydrostatic bearing main shaft mould group as claimed in claim 3, it is characterised in that: the fluid is liquid, gas or magnetic
Property fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821793622.4U CN209130046U (en) | 2018-11-01 | 2018-11-01 | Hydrostatic bearing main shaft mould group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821793622.4U CN209130046U (en) | 2018-11-01 | 2018-11-01 | Hydrostatic bearing main shaft mould group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209130046U true CN209130046U (en) | 2019-07-19 |
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ID=67233603
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821793622.4U Active CN209130046U (en) | 2018-11-01 | 2018-11-01 | Hydrostatic bearing main shaft mould group |
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| Country | Link |
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| CN (1) | CN209130046U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894854A (en) * | 2019-09-25 | 2020-03-20 | 北京工业大学 | Integrated permanent magnetism suspension's heavy load air supporting main shaft |
-
2018
- 2018-11-01 CN CN201821793622.4U patent/CN209130046U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894854A (en) * | 2019-09-25 | 2020-03-20 | 北京工业大学 | Integrated permanent magnetism suspension's heavy load air supporting main shaft |
| CN110894854B (en) * | 2019-09-25 | 2021-06-04 | 北京工业大学 | Integrated permanent magnetism suspension's heavy load air supporting main shaft |
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