CN110614386A - High-precision hydrostatic pressure spindle - Google Patents
High-precision hydrostatic pressure spindle Download PDFInfo
- Publication number
- CN110614386A CN110614386A CN201910885712.9A CN201910885712A CN110614386A CN 110614386 A CN110614386 A CN 110614386A CN 201910885712 A CN201910885712 A CN 201910885712A CN 110614386 A CN110614386 A CN 110614386A
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- oil
- spindle
- hydrostatic
- oil return
- bearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to a high-precision hydrostatic spindle, wherein front and rear sealing cover assemblies are respectively mounted at two ends of a spindle outer sleeve, two ends of a rotary spindle are coaxially supported and mounted on front and rear hydrostatic bearing assemblies, a spindle locking sleeve is mounted in tight fit with the rotary spindle, the spindle outer sleeve is provided with an oil inlet hole and an oil return hole, the front end part of the rotary spindle is provided with a positioning pillow block, the front end surface of the front hydrostatic bearing assembly is provided with a front thrust pressure oil chamber matched with the positioning pillow block, the rear end surface of the front hydrostatic bearing assembly is provided with a rear thrust pressure oil chamber matched with the spindle locking sleeve, an oil return chamber and an oil return outlet are formed in the radial position of the front sealing cover assembly corresponding to the front thrust pressure oil chamber, the oil return chamber is communicated with an oil return channel of the. The high-precision hydrostatic pressure main shaft has the advantages that the operation of a hydrostatic pressure oil supply system is more reliable, the high rotation precision and rigidity are effectively ensured during high-speed operation, and the high rotation precision and rigidity are realized during low-speed operation.
Description
Technical Field
The invention relates to a high-precision main shaft, in particular to a high-precision hydrostatic pressure main shaft.
Background
At present, a main shaft of a numerical control machine tool is supported by a rolling bearing mostly, and the rotation precision of the main shaft of 3-5 mu m can be ensured generally. However, the accuracy of the numerical control machine tool has been improved, and in order to improve the machining accuracy of the machine tool, the machining surface roughness Ra is 0.2 μm or less, and it is required that the vibration when the machine tool spindle rotates is small. However, when the main shaft of the rolling bearing is adopted, the rolling body in the rolling bearing vibrates, and the roughness of the processed surface cannot reach Ra of less than or equal to 0.2 mu m. In addition, a conventional machine tool spindle adopts a hydrodynamic and hydrostatic spindle, such as a grinding machine spindle, the rotation precision of the hydrodynamic and hydrostatic spindle can reach 1 μm, and the hydrodynamic and hydrostatic spindle can achieve better rotation precision and higher rigidity when running at high speed, but the hydrodynamic and hydrostatic spindle is only suitable for grinding machine products and cannot be suitable for other machine tool products. Because the hydrostatic pressure spindle cannot generate enough pressure difference when the rotating speed is low, the requirements of better rotating precision and higher rigidity can not be met when the hydrostatic pressure spindle runs at low speed. In addition, the existing static pressure main shaft cannot normally operate due to the fact that the liquid pressure in the cavity of the main shaft outer sleeve is too low due to the blockage of an oil line, the blockage of an oil hole, the abnormal oil supply of a static pressure system and the like, and the liquid pressure in the cavity cannot be detected in real time, so that the existing static pressure main shaft can only be maintained after the static pressure main shaft stops operating, and the machining operation efficiency is greatly influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-precision hydrostatic pressure spindle which has high rotation precision and rigidity during high-speed operation and can realize high rotation precision and rigidity during low-speed operation.
The technical problem to be solved by the invention is realized by the following technical scheme:
the utility model provides a high accuracy hydrostatic pressure main shaft, including rotatory main shaft, the main shaft overcoat, preceding hydrostatic bearing subassembly, back hydrostatic bearing subassembly, the main shaft lock sleeve, preceding seal cover subassembly, the sealed subassembly of back, rotatory main shaft both ends coaxial support is installed in preceding hydrostatic bearing subassembly and the back hydrostatic bearing subassembly in the main shaft overcoat, preceding seal cover subassembly, the sealed subassembly of back are installed respectively at main shaft overcoat both ends, the main shaft lock sleeve is installed with rotatory main shaft tight fit, the main shaft overcoat system has inlet port and oil gallery: the front end part of the rotating spindle is provided with a positioning pillow block, the front end surface of the front static pressure bearing assembly is provided with a front thrust pressure oil chamber matched with the positioning pillow block, the rear end surface of the front static pressure bearing assembly is provided with a rear thrust pressure oil chamber matched with the spindle locking sleeve, the radial position of the front sealing cover assembly corresponding to the front thrust pressure oil chamber is provided with an oil return chamber and an oil return outlet, the oil return chamber is communicated with an oil return channel of the spindle outer sleeve through the oil return outlet, and the oil return channel is communicated with an oil return hole.
And the rear sealing cover assembly is provided with an oil return cavity and an oil return outlet and is communicated with the oil return channel, and the oil return channel is communicated with the oil return hole.
And a second oil return hole is also formed in the spindle outer sleeve and communicated with a middle oil cavity between the spindle outer sleeve and the rotating spindle through a second oil return channel formed in the spindle outer sleeve.
And, the preceding seal lid subassembly includes the sealed lid of front end, the rotatory oil blanket of front end and front end oil seal lid, and back sealing member subassembly includes the sealed lid of rear end, the rotatory oil blanket of rear end and back oil seal lid.
And, the preceding sealed cover subassembly is the airtight end cover of front, back sealed cover subassembly is the airtight end cover of back.
The front hydrostatic bearing is provided with a bearing oil inlet hole, a centering pressure oil chamber, a radial restrictor, a front thrust pressure oil chamber, a rear thrust pressure oil chamber and a thrust direction restrictor, and the bearing oil inlet hole is communicated with the radial restrictor and the thrust direction restrictor; a front thrust pressure oil chamber and a rear thrust pressure oil chamber of the front hydrostatic bearing are respectively provided with a first detection hole and a second detection hole, and the first detection hole and the second detection hole are communicated to a meter mounting hole formed on the spindle outer sleeve through a first detection channel formed on the front hydrostatic bearing; and the centering pressure oil chambers of the front hydrostatic bearing are provided with third detection holes, the front end flange part of the front hydrostatic bearing is provided with a second detection channel, and the second detection channel is communicated to the instrument mounting hole formed in the front hydrostatic bearing.
The rear hydrostatic bearing is provided with a bearing oil inlet hole, a centering pressure oil chamber, a radial restrictor, a front thrust pressure oil chamber, a rear thrust pressure oil chamber and a thrust direction restrictor, and the bearing oil inlet hole is communicated with the radial restrictor and the thrust direction restrictor; and the centering pressure oil cavities of the rear hydrostatic bearing are provided with fourth detection holes, a flange part at the front end of the rear hydrostatic bearing is provided with a third detection channel, and the third detection channel is communicated to instrument mounting holes formed in the rear hydrostatic bearing.
Moreover, the front sealing cover component adopts a front end air sealing cover, and the rear sealing cover component adopts a rear end air sealing cover.
The invention has the advantages and beneficial effects that:
1. the invention relates to a high-precision hydrostatic pressure spindle, which comprises a rotary spindle, a front hydrostatic pressure bearing assembly, a rear hydrostatic pressure bearing assembly, a spindle locking sleeve, a front sealing end cover assembly, a rear sealing end cover assembly and a hydrostatic pressure oil supply system, wherein the rotary spindle and the spindle locking sleeve are tightly mounted, and the rotary spindle, the spindle locking sleeve and the front hydrostatic pressure bearing assembly form the front hydrostatic pressure assembly with a radial centering effect and an axial thrust effect; the rotating spindle and the aft hydrostatic bearing assembly form an aft hydrostatic assembly with an auxiliary centering effect.
2. According to the high-precision hydrostatic spindle, the positioning pillow block is arranged at the front end part of the rotating spindle, the front end face of the front hydrostatic bearing assembly is provided with the front thrust pressure oil chamber, the rear end face of the front hydrostatic bearing assembly is provided with the rear thrust pressure oil chamber, the front hydrostatic bearing assembly forms a hydraulic oil film through the centering pressure oil chamber in the inner hole, the radial centering effect of a bearing is realized, and the hydraulic oil film is formed through the front thrust pressure oil chamber at the front end face of the front hydrostatic bearing assembly and the end face of the positioning pillow block of the rotating spindle; and a hydraulic oil film between a rear thrust pressure oil chamber on the rear end face of the front hydrostatic bearing assembly and the end face of the main shaft locking sleeve realizes the axial thrust action of the bearing.
3. According to the high-precision hydrostatic pressure spindle, hydraulic oil flows out from the first oil return outlet and the second oil return outlet which are respectively arranged in the front end sealing cover and the rear end sealing cover, reaches the first oil return channel in the spindle outer sleeve, then flows out through the first oil return hole, is communicated with the middle oil cavity in the spindle outer sleeve at the other position, directly flows out from the second oil return channel on the spindle outer sleeve to the second oil return hole, and enters the oil tank of the oil supply system.
4. According to the high-precision hydrostatic spindle, the hydraulic oil pressure in each cavity is detected in real time through the detection holes arranged in the centering pressure oil cavities and the thrust pressure oil cavities of the front and rear hydrostatic bearings, so that the problems that the hydrostatic system is not normally supplied with oil due to blockage of oil way pipelines and the oil holes are blocked, and the spindle outer sleeve cavity cannot normally operate due to too low liquid pressure in the cavity are solved, and the operation efficiency is improved.
5. According to the high-precision hydrostatic pressure main shaft, the front end air sealing cover and the rear end air sealing cover are adopted to replace parts, namely the front end sealing cover and the rear end sealing cover respectively, so that the problem of heating of a rotary oil seal caused by high rotating speed of the main shaft can be effectively solved, and hydraulic oil in the main shaft does not flow out of front and rear end covers of the main shaft by introducing air into the front end air inlet and the rear end air inlet.
6. The high-precision hydrostatic pressure main shaft is reasonable in design, the operation of a hydrostatic pressure oil supply system is more reliable, the high rotation precision and rigidity are effectively guaranteed during high-speed operation, and the high rotation precision and rigidity are realized during low-speed operation.
Drawings
FIG. 1 is a schematic structural view (cross-sectional view) of the present invention;
FIG. 2 is a schematic view of the present invention (showing the oil return hole);
FIG. 3 is a perspective view of the present invention;
FIG. 4 is a front view of a front/rear hydrostatic bearing of the present invention;
FIG. 5 is a perspective view of a front/rear hydrostatic bearing of the present invention;
FIG. 6 is a cross-sectional view of FIG. 4;
FIG. 7 is a cross-sectional view (at another angle) of FIG. 3;
fig. 8 is a schematic structural view (sectional view) of another embodiment of the present invention.
Description of reference numerals:
1-rotating spindle, 101-positioning pillow block, 2-front end oil seal cover, 3-front end rotating oil seal, 4-front end seal cover, 5-front static pressure bearing, 6-front end bearing sleeve, 7-spindle outer sleeve, 8-spindle locking sleeve, 9-expansion sleeve, 10-rear static pressure bearing, 11-rear end bearing sleeve, 12-rear end seal cover, 13-rear end rotating oil seal, 14-rear oil seal cover, 15-oil inlet hole, 16-oil return hole, 17-centering pressure oil chamber, 18-thrust pressure oil chamber, 1801-front thrust pressure oil chamber, 1802-rear thrust pressure oil chamber, 19-oil chamber middle part, 20-centering pressure oil chamber, 21-first oil return channel, 22-bearing oil inlet hole, 23-bearing oil inlet hole, 24-a first detection hole, 25-a thrust direction restrictor, 26-a radial restrictor, 27-a first oil return cavity, 28-a first oil return outlet, 29-a second oil return outlet, 30-a second oil return cavity, 31-a second oil return channel, 32-a second detection hole, 33-a first detection channel, 34-a first instrument mounting hole, 35-a third detection hole, 36-a second detection channel, 37-a second instrument mounting hole, 38-a front end air sealing cover, 39-a front end air inlet hole, 40-a rear end air sealing cover and 41-a rear end air inlet hole.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
A high-precision hydrostatic pressure spindle is shown in figure 1 and comprises a rotary spindle 1, a spindle sleeve 7, a front hydrostatic pressure bearing assembly, a rear hydrostatic pressure bearing assembly, a spindle locking sleeve 8, a front sealing cover assembly and a rear sealing cover assembly, wherein two ends of the rotary spindle are coaxially supported and arranged in the front hydrostatic pressure bearing assembly and the rear hydrostatic pressure bearing assembly in the spindle sleeve, the front sealing cover assembly and the rear sealing cover assembly are respectively arranged at two ends of the spindle sleeve, and the spindle locking sleeve 8 is positioned in the spindle sleeve 7 and coaxially and tightly matched with the rotary spindle 1. The main shaft outer sleeve 7 is provided with an oil inlet 15 and an oil return hole 16. The rear end of the main shaft locking sleeve 8 is provided with an expansion sleeve 9.
The front hydrostatic bearing assembly includes a front hydrostatic bearing 5 and a front end bearing housing 6. The front hydrostatic bearing is provided with a bearing oil inlet hole 22, a centering pressure oil chamber 17, a radial restrictor 26, a thrust pressure oil chamber 18 and a thrust restrictor 25. The bearing oil inlet hole 22 is communicated with the radial throttler 26 and the thrust throttler 17, and the centering pressure oil chambers 17 and the radial throttler 26 are uniformly distributed on the inner wall of the front hydrostatic bearing according to use requirements, wherein the centering pressure oil chambers 17 and the radial throttler are four groups in the embodiment. The radial throttles 26 are all provided with oil inlet holes and oil return holes. The front end face and the rear end face of the front static pressure main shaft are both provided with a thrust pressure oil chamber 18 and a thrust direction restrictor 25, and the thrust direction restrictor 25 is both provided with an oil inlet hole and an oil return hole. The thrust pressure oil chamber 18 includes a front thrust pressure oil chamber 1801 and a rear thrust pressure oil chamber 1802 located on the front end surface and the rear end surface of the front hydrostatic bearing. The front thrust pressure oil chamber 1801 and the rear thrust pressure oil chamber 1802 are two thrust pressure oil chambers which are symmetrically arranged on the front end surface or the rear end surface of the hydrostatic bearing, and the four thrust pressure oil chambers are totally four. The front end of the rotating main shaft 1 is provided with a positioning pillow block 101. The front thrust pressure oil chamber 1801 of the front hydrostatic bearing 5 is matched with the positioning pillow block 101, and the rear thrust pressure oil chamber 1802 is matched with the front end face of the main shaft locking sleeve 7.
The rear hydrostatic bearing assembly comprises a rear hydrostatic bearing 10 and a rear end bearing sleeve 11, wherein the rear hydrostatic bearing is provided with a bearing oil inlet hole 23, a centering pressure oil chamber 20, a radial restrictor, a thrust pressure oil chamber and a thrust direction restrictor, and the radial restrictor and the thrust direction restrictor are both provided with oil inlet holes and oil return holes. The rear hydrostatic bearing and the front hydrostatic bearing have the same structure and can be interchanged.
As shown in fig. 2, the front seal cover assembly includes a front seal cover 4, a front rotary oil seal 3 and a front oil seal cover 2, a first oil return chamber 27 and a first oil return outlet 28 are formed in a radial position of the front seal cover 4 corresponding to the front thrust pressure oil chamber 1801 of the front hydrostatic bearing 5, the first oil return chamber 27 and the first oil return outlet 28 are communicated with a first oil return passage 21 of the spindle housing 7, and the first oil return passage 21 is communicated with a first oil return hole 1601 formed in the spindle housing 7. The rear seal cover assembly includes a rear seal cover 12, a rear rotary oil seal 13 and a rear oil seal cover 14. A second oil return cavity 30 is formed between the rear end sealing cover 12 and the rear end surface of the rear hydrostatic bearing 10, a second oil return outlet 29 communicated with the second oil return cavity 30 is formed on the rear end sealing cover 12, and the second oil return outlet 29 is communicated with the first oil return passage 21 and communicated with the first oil return hole 1601, as shown in fig. 3. A second oil return hole 1602 is formed in the spindle housing, and the second oil return hole 1602 is communicated with a second oil return channel 31 formed in the spindle housing 7 and communicated with a middle oil cavity 19 between the spindle housing 7 and the rotary spindle.
The static pressure oil supply system is optimally designed, and the oil inlet 15 passes through the spindle outer sleeve 7, respectively enters the front end bearing sleeve 6 and the rear end bearing sleeve 11, respectively enters the centering pressure oil chamber 21 and the thrust pressure oil chamber 18 of the front end static pressure bearing 5 and the rear end static pressure bearing 10, respectively establishes a liquid static pressure system with the rotating spindle 1, and suspends the rotating spindle 1 in a liquid oil film. The hydraulic oil flows out after passing through the throttler of the front end hydrostatic bearing 5 and the rear end hydrostatic bearing 10 and each pressure oil cavity, the hydraulic oil at the front end flows into the front end sealing cover 2, the hydraulic oil at the rear end flows into the rear end sealing cover 12, because the two ends of the front end sealing cover 2 and the rear end sealing cover 12 are both provided with the low pressure resistant rotary oil seals 3 and 13, the hydraulic oil respectively flows out from the first oil return outlet 28 and the second oil return outlet 29 arranged inside the front end sealing cover 2 and the rear end sealing cover 12, reaches the first oil return channel 21 inside the spindle sleeve 7, and then respectively flows out from the oil return hole 1601, the other oil return hole 1602 does not pass through the front end sealing cover 2 and the rear end sealing cover 12, directly flows out from the middle oil cavity 19 of the spindle sleeve 7, directly flows out from the second oil return channel 31 on the spindle sleeve 7 through the second oil return hole 1602, and.
The radial position of the front end sealing cover 4 corresponding to the front thrust pressure oil chamber 1801 of the front hydrostatic bearing 5 is provided with a first oil return chamber 27 and a first oil return outlet 28, the first oil return chamber 27 and the first oil return outlet 28 are communicated with the first oil return channel 21 of the spindle sleeve 7, so that an oil supply system which is complete and is beneficial for liquid in the spindle sleeve to enter the oil return channel is formed, the oil is prevented from returning to the internal pressure oil chamber, and the working efficiency of the pressure oil chamber is prevented from being reduced.
As shown in fig. 4, 5 and 6, a first detection hole 24 and a second detection hole 32 are respectively formed in a front thrust pressure oil chamber 1801 and a rear thrust pressure oil chamber 1802 of the front hydrostatic bearing 5, the first detection hole 24 and the second detection hole 32 are communicated to a first instrument mounting hole 34 formed in the front hydrostatic bearing 5 through a first detection channel 33 formed in the front hydrostatic bearing 5 and a flange thereof, and a pressure detection instrument 42 is mounted on the first instrument mounting hole 34, so that a pressure signal is transmitted to the pressure detection instrument 42, and the hydraulic oil pressure of the front thrust pressure oil chamber and the rear thrust pressure oil chamber of the front hydrostatic bearing is detected.
As shown in fig. 7, each centering pressure oil chamber 17 of the front hydrostatic bearing 5 is provided with a third detection hole 35, a flange portion at the front end of the front hydrostatic bearing is provided with a second detection channel 36, the second detection channel 36 is communicated with a second instrument mounting hole 37 formed in the front hydrostatic bearing 5, and a pressure detection instrument is mounted on the second instrument mounting hole 37, so that a pressure signal is transmitted to the pressure detection instrument, and the hydraulic oil pressure of the centering pressure oil chamber of the front hydrostatic bearing is detected.
The rear hydrostatic bearing 10 is provided with a bearing oil inlet hole, a centering pressure oil chamber 20, a radial restrictor, a front thrust pressure oil chamber, a rear thrust pressure oil chamber and a thrust direction restrictor, and the bearing oil inlet hole is communicated with the radial restrictor and the thrust direction restrictor; and the centering pressure oil chambers of the rear hydrostatic bearing are provided with fourth detection holes, a flange part at the front end of the rear hydrostatic bearing is provided with a third detection channel, and the third detection channel is communicated to a third instrument mounting hole formed in the rear hydrostatic bearing. The detection of the hydraulic oil pressure of the centering pressure oil chamber of the rear hydrostatic bearing is realized (similar to the front hydrostatic bearing, and the drawing is omitted).
The hydraulic oil pressures of the centering pressure oil cavities and the thrust pressure oil cavities of the front and rear static pressure bearings are detected in real time, so that the problems that the oil supply of a static pressure system is abnormal and the liquid pressure in the cavity of the outer sleeve of the main shaft is too low to normally operate due to the fact that oil passages are blocked and oil holes are not communicated are solved, and the operation efficiency is improved.
Example 2
A high-precision hydrostatic pressure spindle is shown in figure 8, a front end air sealing cover 38 and a rear end air sealing cover 40 are adopted to replace a front end sealing cover 4 and a rear end sealing cover 12 of a part respectively, and the problem of heating of a rotary oil seal caused by high rotating speed of the spindle can be effectively solved. The front end airtight cover 38 and the rear end airtight cover 40 are provided with a front end air intake hole 39 and a rear end air intake hole 41, respectively. Air is introduced into the front end air inlet hole 39 and the rear end air inlet hole 41, so that the hydraulic oil in the main shaft does not flow out from the front end cover and the rear end cover of the main shaft. The others are the same as in example 1.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (8)
1. The utility model provides a high accuracy hydrostatic pressure main shaft, including rotatory main shaft, the main shaft overcoat, preceding hydrostatic bearing subassembly, back hydrostatic bearing subassembly, the main shaft lock sleeve, preceding seal cover subassembly, the sealed subassembly of back, rotatory main shaft both ends coaxial support is installed in preceding hydrostatic bearing subassembly and the back hydrostatic bearing subassembly in the main shaft overcoat, preceding seal cover subassembly is installed respectively at main shaft overcoat both ends, the sealed subassembly of back, the main shaft lock sleeve is installed with rotatory main shaft tight fit, the main shaft overcoat system has inlet port and oil gallery, its characterized in that: the front end part of the rotating spindle is provided with a positioning pillow block, the front end surface of the front static pressure bearing assembly is provided with a front thrust pressure oil chamber matched with the positioning pillow block, the rear end surface of the front static pressure bearing assembly is provided with a rear thrust pressure oil chamber matched with the spindle locking sleeve, the radial position of the front sealing cover assembly corresponding to the front thrust pressure oil chamber is provided with an oil return chamber and an oil return outlet, the oil return chamber is communicated with an oil return channel of the spindle outer sleeve through the oil return outlet, and the oil return channel is communicated with an oil return hole.
2. A high precision hydrostatic spindle according to claim 1, wherein: the rear sealing cover assembly is provided with an oil return cavity and an oil return outlet and is communicated with the oil return channel, and the oil return channel is communicated with the oil return hole.
3. A high precision hydrostatic spindle according to claim 1, wherein: and a second oil return hole is also formed in the spindle outer sleeve and is communicated with a middle oil cavity between the spindle outer sleeve and the rotating spindle through a second oil return channel formed in the spindle outer sleeve.
4. A high precision hydrostatic spindle according to claim 1, wherein: the front sealing cover component comprises a front end sealing cover, a front end rotary oil seal and a front end oil sealing cover, and the rear sealing component comprises a rear end sealing cover, a rear end rotary oil seal and a rear oil sealing cover.
5. A high precision hydrostatic spindle according to claim 1, wherein: the front sealing cover assembly is a front air-tight end cover, and the rear sealing cover assembly is a rear air-tight end cover.
6. A high precision hydrostatic spindle according to claim 1, wherein: the front hydrostatic bearing is provided with a bearing oil inlet hole, a centering pressure oil chamber, a radial restrictor, a front thrust pressure oil chamber, a rear thrust pressure oil chamber and a thrust direction restrictor, and the bearing oil inlet hole is communicated with the radial restrictor and the thrust direction restrictor; a front thrust pressure oil chamber and a rear thrust pressure oil chamber of the front hydrostatic bearing are respectively provided with a first detection hole and a second detection hole, and the first detection hole and the second detection hole are communicated to an instrument mounting hole formed on the spindle outer sleeve through a first detection channel formed on the front hydrostatic bearing; and the centering pressure oil chambers of the front hydrostatic bearing are provided with third detection holes, the flange part at the front end of the front hydrostatic bearing is provided with a second detection channel, and the second detection channel is communicated to the instrument mounting hole formed in the front hydrostatic bearing.
7. A high precision hydrostatic spindle according to claim 1, wherein: the rear hydrostatic bearing is provided with a bearing oil inlet hole, a centering pressure oil chamber, a radial restrictor, a front thrust pressure oil chamber, a rear thrust pressure oil chamber and a thrust direction restrictor, and the bearing oil inlet hole is communicated with the radial restrictor and the thrust direction restrictor; and the centering pressure oil cavities of the rear hydrostatic bearing are provided with fourth detection holes, a flange part at the front end of the rear hydrostatic bearing is provided with a third detection channel, and the third detection channel is communicated to instrument mounting holes formed in the rear hydrostatic bearing.
8. A high precision hydrostatic spindle according to claim 1, wherein: the front sealing cover assembly adopts a front end air sealing cover, and the rear sealing cover assembly adopts a rear end air sealing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910885712.9A CN110614386A (en) | 2019-09-19 | 2019-09-19 | High-precision hydrostatic pressure spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910885712.9A CN110614386A (en) | 2019-09-19 | 2019-09-19 | High-precision hydrostatic pressure spindle |
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| Publication Number | Publication Date |
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| CN110614386A true CN110614386A (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910885712.9A Pending CN110614386A (en) | 2019-09-19 | 2019-09-19 | High-precision hydrostatic pressure spindle |
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| CN (1) | CN110614386A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022500A (en) * | 2020-01-07 | 2020-04-17 | 中国工程物理研究院总体工程研究所 | Hydrostatic bearing working in high G value centrifugal field |
| CN111623038A (en) * | 2020-07-06 | 2020-09-04 | 德本恒嘉精机(昆山)有限公司 | Ultrahigh-precision hydrostatic bearing |
| CN112720255A (en) * | 2021-01-08 | 2021-04-30 | 关世和 | Hydraulic single-action variable axial force bidirectional variable speed ultrahigh precision static pressure workpiece shaft |
| CN112743351A (en) * | 2020-12-24 | 2021-05-04 | 杭州铁泰自动化科技有限公司 | High-precision dynamic and static pressure main shaft system |
| CN114321191A (en) * | 2022-01-26 | 2022-04-12 | 湖大海捷(湖南)工程技术研究有限公司 | Axial fixing structure of static pressure main shaft |
| CN114799238A (en) * | 2022-06-28 | 2022-07-29 | 云南省机械研究设计院有限公司 | High-bearing large dynamic horizontal dynamic and static pressure main shaft system |
-
2019
- 2019-09-19 CN CN201910885712.9A patent/CN110614386A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022500A (en) * | 2020-01-07 | 2020-04-17 | 中国工程物理研究院总体工程研究所 | Hydrostatic bearing working in high G value centrifugal field |
| CN111623038A (en) * | 2020-07-06 | 2020-09-04 | 德本恒嘉精机(昆山)有限公司 | Ultrahigh-precision hydrostatic bearing |
| CN111623038B (en) * | 2020-07-06 | 2023-08-29 | 德本恒嘉精机(昆山)有限公司 | Ultra-high precision hydrostatic bearing |
| CN112743351A (en) * | 2020-12-24 | 2021-05-04 | 杭州铁泰自动化科技有限公司 | High-precision dynamic and static pressure main shaft system |
| CN112720255A (en) * | 2021-01-08 | 2021-04-30 | 关世和 | Hydraulic single-action variable axial force bidirectional variable speed ultrahigh precision static pressure workpiece shaft |
| CN114321191A (en) * | 2022-01-26 | 2022-04-12 | 湖大海捷(湖南)工程技术研究有限公司 | Axial fixing structure of static pressure main shaft |
| CN114321191B (en) * | 2022-01-26 | 2024-05-14 | 湖大海捷(湖南)工程技术研究有限公司 | Static pressure main shaft axial fixing structure |
| CN114799238A (en) * | 2022-06-28 | 2022-07-29 | 云南省机械研究设计院有限公司 | High-bearing large dynamic horizontal dynamic and static pressure main shaft system |
| CN114799238B (en) * | 2022-06-28 | 2022-09-23 | 中国机械总院集团云南分院有限公司 | High-bearing large dynamic horizontal dynamic and static pressure main shaft system |
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