CN111579143B - Experimental device for continuously measuring gas film pressure field of near-wall layer of gas static pressure main shaft - Google Patents
Experimental device for continuously measuring gas film pressure field of near-wall layer of gas static pressure main shaft Download PDFInfo
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- CN111579143B CN111579143B CN202010254267.9A CN202010254267A CN111579143B CN 111579143 B CN111579143 B CN 111579143B CN 202010254267 A CN202010254267 A CN 202010254267A CN 111579143 B CN111579143 B CN 111579143B
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- main shaft
- gas
- shaft sleeve
- hollow main
- disc
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0046—Fluidic connecting means using isolation membranes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
A gas film pressure field continuous measurement experimental device of a near-wall layer of a gas static pressure main shaft comprises a main shaft system, a sensing test system and a gas source system; the spindle system comprises a hollow spindle, a spindle sleeve is sleeved outside the hollow spindle, and a spindle sleeve fixing sleeve is sleeved outside the spindle sleeve; the two end parts of the hollow main shaft are respectively provided with a thrust disc, and the outer side of the thrust disc is provided with a push disc; a guide rail is arranged below the hollow main shaft, and the lower end of the push disc is arranged in the guide rail in a sliding manner; a first air film is formed in a gap between the push disc and the thrust disc, and a second air film is formed in a gap between the hollow main shaft and the shaft sleeve; the gas source system comprises a gas source generator, a gas processing device and a conveying gas pipe; the sensing test system comprises a micro-pressure sensor, a signal collector and an industrial control analysis table; the method can accurately and continuously measure the gas film pressure field of the near-wall layer of the hollow main shaft, is beneficial to verifying and improving the gas film pressure model of the gas static pressure main shaft, and provides data support for the optimal design of the gas static pressure main shaft.
Description
Technical Field
The invention relates to a gas film pressure field continuous measurement experimental device of a near-wall layer of a gas static pressure main shaft.
Background
The gas static pressure main shaft adopts a pressure gas film as a working medium and carries the load through gas pressure. The static and dynamic characteristics of the gas bearing have important influence on the comprehensive performance of the main shaft, the rotation precision of the main shaft is directly determined to a certain degree, and the static and dynamic characteristics of the gas bearing are directly influenced by the characteristics of the pressure field of the air film. The measurement of the air film pressure field of the air static pressure spindle under the real working state is very difficult, so an experimental device capable of reflecting the working condition of the actual air static pressure spindle needs to be designed, the measurement difficulty of the air film pressure field is reduced, and the accurate measurement of the air film pressure is realized. The air film can be divided into a near-wall layer, a thin layer and a continuous flow layer along the radial direction of the main shaft, the air film pressure of the near-wall layer of the main shaft directly influences the rotation precision of the main shaft, but the conventional sensor is usually arranged on the shaft sleeve, and the measured value is usually the air film pressure of the near-wall layer of the shaft sleeve. In addition, due to the limitation of factors such as the size of the sensor, generally, only multipoint measurement can be adopted, and continuous measurement is difficult to realize. Compared with multipoint measurement, the continuous measurement can more accurately reflect the actual condition of the air film pressure field. Therefore, the experimental device for continuously measuring the gas film pressure field of the near-wall layer of the main shaft is designed, and has important value.
Disclosure of Invention
In order to overcome the problems, the invention provides a continuous measurement experimental device for the gas film pressure field of the near-wall layer of the gas static pressure main shaft.
The technical scheme adopted by the invention is as follows: a gas film pressure field continuous measurement experimental device of a near-wall layer of a gas static pressure main shaft comprises a main shaft system, a sensing test system and a gas source system;
the spindle system includes: the device comprises a hollow main shaft, a thrust disc, a push disc, a shaft sleeve fixing sleeve and a guide rail; the two end parts of the hollow main shaft are respectively provided with a thrust disc, and the outer side of the thrust disc is provided with a push disc; a shaft sleeve is sleeved outside the hollow main shaft, and a shaft sleeve fixing sleeve is sleeved outside the shaft sleeve; at least four pushing disc throttling holes distributed at intervals are formed in the pushing disc along the circumferential direction; the shaft sleeve is symmetrically provided with two groups of shaft sleeve throttling holes by taking the central radial section as a center, each group of shaft sleeve throttling holes comprises at least four shaft sleeve throttling holes, the axes of each group of shaft sleeve throttling holes are positioned on the same radial section, and each group of shaft sleeve throttling holes are distributed at intervals along the circumferential direction of the shaft sleeve; a first gap groove is formed in a gap between the thrust disc and the push disc, and a second gap groove is formed in a gap between the hollow main shaft and the shaft sleeve; the push disc throttling hole is communicated with the first clearance groove, and the shaft sleeve throttling hole is communicated with the second clearance groove; the push disc throttling hole and the shaft sleeve throttling hole are respectively connected with an air source system, a first air film is formed in the first clearance groove, and a second air film is formed in the second clearance groove; a guide rail is arranged below the hollow main shaft along the vertical direction, the axis of the guide rail is parallel to the axis of the hollow main shaft, and scales are arranged on the outer surface of the guide rail along the axis of the guide rail; the lower end of the push disc is arranged in the guide rail in a sliding mode through the sliding block and can move along the axial direction of the hollow main shaft;
the sensing test system includes: the system comprises a micro pressure sensor, a signal collector and an industrial control analysis table; the hollow main shaft is provided with at least four fine holes which are distributed at intervals along the circumferential direction on the central radial section of the hollow main shaft; each pore is respectively inserted into a micro-pressure sensor from the inside of the hollow main shaft, the micro-pressure sensor is connected to a signal collector through a shielding cable, and the signal collector is connected to the industrial control analysis table through a signal wire;
the gas source system comprises: the device comprises a gas source generator for generating high-pressure gas, a gas processing device for filtering, purifying, decompressing, stabilizing and controlling the temperature of the high-pressure gas, and a gas conveying pipe; the push disc orifice and the shaft sleeve orifice are respectively connected with a gas processing device and a gas source generator in sequence through gas conveying pipes.
The invention has the beneficial effects that: the gas film pressure field of the near-wall layer of the hollow main shaft can be accurately and continuously measured, verification is facilitated, a gas film pressure model of the gas static pressure main shaft is improved, and data support is provided for the optimal design of the gas static pressure main shaft; the test process is free from interference and high in reliability.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Figure 2 is a cross-sectional view of the spindle system of the present invention.
Description of reference numerals: 1. a hollow main shaft; 2. a shaft sleeve; 2-1, a shaft sleeve orifice; 3. a shaft sleeve fixing sleeve; 4. a micro-pressure sensor; 5. a second gas film; 6. an industrial control analysis table; 7. a signal collector; 8. a gas processing device; 9. an air source generator; 10. a gas delivery pipe; 11. pushing the disc; 11-1, push plate orifice; 12. a thrust plate; 13. a guide rail.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto:
referring to the attached drawing, the experimental device for continuously measuring the gas film pressure field of the near-wall layer of the gas static pressure spindle comprises a spindle system, a sensing test system and a gas source system;
the spindle system includes: the device comprises a hollow main shaft 1, a thrust disc 12, a push disc 11, a shaft sleeve 2, a shaft sleeve fixing sleeve 3 and a guide rail 12; two end parts of the hollow main shaft 1 are respectively provided with a thrust disc 12, and the outer side of the thrust disc 12 is provided with a push disc 11; the hollow spindle 1 is externally sleeved with a spindle sleeve 2, the spindle sleeve 2 is externally sleeved with a spindle sleeve fixing sleeve 3, and the spindle sleeve fixing sleeve 3 plays a role in fixing the spindle sleeve 2; four pushing disc throttling holes 11-1 distributed at intervals are formed in the pushing disc 11 along the circumferential direction; the shaft sleeve 2 is symmetrically provided with two groups of shaft sleeve throttling holes by taking the central radial section as a center, each group of shaft sleeve throttling holes comprises four shaft sleeve throttling holes 2-1, the axes of each group of shaft sleeve throttling holes are positioned on the same radial section, and each group of shaft sleeve throttling holes are distributed at intervals along the circumferential direction of the shaft sleeve; a first clearance groove is formed in a clearance between the thrust disc 11 and the thrust disc 12, and a second clearance groove is formed in a clearance between the hollow main shaft 1 and the shaft sleeve 2; the push disc throttling hole 11-1 is communicated with the first clearance groove, and the shaft sleeve throttling hole 2-1 is communicated with the second clearance groove; the push disc throttling hole 11-1 and the shaft sleeve throttling hole 2-1 are respectively connected with an air source system, a first air film is formed in the first clearance groove, and a second air film 5 is formed in the second clearance groove; a guide rail 13 is arranged below the hollow main shaft 1 along the vertical direction, the axis of the guide rail 13 is parallel to the axis of the hollow main shaft 1, and scales are arranged on the front surface of the guide rail 13 along the axis; the lower end of the push disc 11 is arranged in the guide rail 13 in a sliding manner through a sliding block and can drive the hollow main shaft 1 to axially move;
the sensing test system comprises: a group of micro pressure sensors 4, a signal collector 7 and an industrial control analysis table 6; the micro-pressure sensors 4 are four in one group; the hollow main shaft 1 is provided with four fine holes which are distributed at intervals along the circumferential direction on the central radial section thereof; each pore is respectively inserted into a micro-pressure sensor 4 from the inside of the hollow main shaft, the micro-pressure sensor 4 is connected to a signal collector 7 through a shielding cable, and the signal collector 7 is connected to the industrial control analysis table 6 through a signal wire;
the gas source system comprises: the gas source generator 9 is used for generating high-pressure gas, the gas processing device 8 is used for filtering, purifying, decompressing, stabilizing and controlling the temperature of the high-pressure gas, and the gas conveying pipe; the push disc throttling hole 11-1 and the shaft sleeve throttling hole 2-1 are respectively connected with a gas processing device 8 and a gas source generator 9 in sequence through gas conveying pipes.
The test process adopted by the experimental device is as follows: firstly, a gas source generator works and generates high-pressure gas, and the high-pressure gas is processed by a gas processing device and then enters a shaft sleeve through a gas conveying pipe; high-pressure gas passes through a throttling hole in the shaft sleeve, a high-pressure gas film is formed in a gap between the shaft sleeve and the hollow main shaft, and the high-pressure gas film acts on the hollow main shaft to play a role in bearing and lubricating; the initial position of the micro pressure sensor is arranged at the end face of the shaft sleeve, the gas film pressure of a near-wall layer of the hollow main shaft is measured after the hollow main shaft runs stably, then the hollow main shaft is moved axially for a micro step length, the gas film thickness on one side of the push disc is reduced while the gas film thickness on the other side of the push disc is increased in the moving process, the gas film force on the push disc is unbalanced, so that the hollow main shaft moves axially, the relative position of the micro pressure sensor and the hollow main shaft is changed, and the measurement data of the micro pressure sensor is recorded when the main shaft reaches a stable state again; and continuously repeating the previous step until the micro-pressure sensor reaches the other end of the shaft sleeve, and obtaining the gas film pressure field of the near-wall layer of the main shaft by the industrial control analysis platform through analyzing the measured pressure data.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.
Claims (1)
1. The utility model provides a near wall layer gas film pressure field continuous measurement experimental apparatus of gas static pressure main shaft which characterized in that: the device comprises a main shaft system, a sensing test system and an air source system;
the spindle system includes: the device comprises a hollow main shaft, a thrust disc, a push disc, a shaft sleeve fixing sleeve and a guide rail; the two end parts of the hollow main shaft are respectively provided with a thrust disc, and the outer side of the thrust disc is provided with a push disc; a shaft sleeve is sleeved outside the hollow main shaft, and a shaft sleeve fixing sleeve is sleeved outside the shaft sleeve; at least four pushing disc throttling holes distributed at intervals are formed in the pushing disc along the circumferential direction; the shaft sleeve is symmetrically provided with two groups of shaft sleeve throttling holes by taking the central radial section as a center, each group of shaft sleeve throttling holes comprises at least four shaft sleeve throttling holes, the axes of each group of shaft sleeve throttling holes are positioned on the same radial section, and each group of shaft sleeve throttling holes are distributed at intervals along the circumferential direction of the shaft sleeve; a first gap groove is formed in a gap between the thrust disc and the push disc, and a second gap groove is formed in a gap between the hollow main shaft and the shaft sleeve; the push disc throttling hole is communicated with the first clearance groove, and the shaft sleeve throttling hole is communicated with the second clearance groove; the push disc throttling hole and the shaft sleeve throttling hole are respectively connected with an air source system, a first air film is formed in the first clearance groove, and a second air film is formed in the second clearance groove; a guide rail is arranged below the hollow main shaft along the vertical direction, the axis of the guide rail is parallel to the axis of the hollow main shaft, and scales are arranged on the outer surface of the guide rail along the axis of the guide rail; the lower end of the push disc is arranged in the guide rail in a sliding mode through the sliding block and can move along the axial direction of the hollow main shaft;
the sensing test system includes: the system comprises a micro pressure sensor, a signal collector and an industrial control analysis table; the hollow main shaft is provided with at least four fine holes which are distributed at intervals along the circumferential direction on the central radial section of the hollow main shaft; each pore is respectively inserted into a micro-pressure sensor from the inside of the hollow main shaft, the micro-pressure sensor is connected to a signal collector through a shielding cable, and the signal collector is connected to the industrial control analysis table through a signal wire;
the gas source system comprises: the device comprises a gas source generator for generating high-pressure gas, a gas processing device for filtering, purifying, decompressing, stabilizing and controlling the temperature of the high-pressure gas, and a gas conveying pipe; the push disc orifice and the shaft sleeve orifice are respectively connected with a gas processing device and a gas source generator in sequence through gas conveying pipes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010254267.9A CN111579143B (en) | 2020-04-02 | 2020-04-02 | Experimental device for continuously measuring gas film pressure field of near-wall layer of gas static pressure main shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010254267.9A CN111579143B (en) | 2020-04-02 | 2020-04-02 | Experimental device for continuously measuring gas film pressure field of near-wall layer of gas static pressure main shaft |
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| Publication Number | Publication Date |
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| CN111579143A CN111579143A (en) | 2020-08-25 |
| CN111579143B true CN111579143B (en) | 2021-08-24 |
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| CN202010254267.9A Active CN111579143B (en) | 2020-04-02 | 2020-04-02 | Experimental device for continuously measuring gas film pressure field of near-wall layer of gas static pressure main shaft |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112556916B (en) * | 2020-10-22 | 2022-03-18 | 浙江工业大学 | Gas static pressure thrust bearing gas film pressure multi-degree-of-freedom measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0684913B2 (en) * | 1985-01-25 | 1994-10-26 | トヨタ自動車株式会社 | Bearing torque measuring device |
| CN206563755U (en) * | 2017-02-09 | 2017-10-17 | 浙江工业大学 | A kind of ultra-precise gas static-pressure main shaft air film speed field test device |
| CN106771333B (en) * | 2017-02-09 | 2023-05-23 | 浙江工业大学 | Ultra-precise gas static pressure main shaft gas film speed field testing device |
| CN206618556U (en) * | 2017-03-06 | 2017-11-07 | 浙江工业大学 | A kind of non-contacting gas hydrostatic spindle air film flow field test system |
| CN106768828B (en) * | 2017-03-06 | 2023-05-23 | 浙江工业大学 | Non-contact type gas static pressure main shaft gas film flow field test system |
| CN108225655B (en) * | 2017-12-22 | 2019-11-26 | 河南科技大学 | A kind of dynamical and static pressure gas bearing dynamic gas film pressure test device and test method |
| CN110030266A (en) * | 2019-03-27 | 2019-07-19 | 浙江工业大学 | A kind of aerostatic bearing gas film pressure vector control apparatus |
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