CN108535413B - High-stability plane air film parameter measuring device - Google Patents
High-stability plane air film parameter measuring device Download PDFInfo
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- CN108535413B CN108535413B CN201810268506.9A CN201810268506A CN108535413B CN 108535413 B CN108535413 B CN 108535413B CN 201810268506 A CN201810268506 A CN 201810268506A CN 108535413 B CN108535413 B CN 108535413B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention discloses a high-stability plane air film parameter measuring device. The invention comprises a scale wheel pointer, a scale wheel connecting piece, a screw rod supporting side plate, a force unloading column, a central body, a pipe clamp, an upper cross beam, a compression spring, a cross beam bracket, a force unloading plate, a spring expansion adjusting ring, a supporting square column, a temperature sensor, a lower bottom plate, a device roller, an adjustable base, a transverse motor guide rail, a longitudinal motor guide rail, a pressure sensor, a working platform, a double U-shaped throttle, a back-off connecting shaft piece, a displacement sensor, a magnetic gauge stand, a pipe sleeve, a guide rail sliding block, a directional guide rail, a screw rod supporting upper top plate, a screw rod connecting shaft piece and an adjusting hand wheel. The invention adopts the design concept that the air pressure bearing module and the air film adjusting module are separated, thereby not only reducing the abrasion of the screw rod, but also greatly improving the stability of the air film, reducing the return error caused by the air inlet of the throttle, and simultaneously adopting the upper computer software to complete the automatic measurement, and reducing the interference of human factors.
Description
Technical Field
The invention relates to the field of static pressure gas lubrication, in particular to a high-stability plane gas film parameter measuring device.
Background
The gas lubrication technology is to introduce the filtered, dried and compressed gas between contact surfaces of mechanical parts, and to form a huge gas tension by using the pressure of the compressed gas to prevent the contact between the mechanical parts, so as to achieve the lubrication effect inside the device. Compared with the traditional grease lubrication technology, the static pressure gas lubrication technology has the advantages of high recycling rate, cleanliness, no pollution and the like. Therefore, the research on the internal gas parameters of the parts is a key factor of breakthrough of the static pressure gas lubrication technology.
At present, only few universities in China have devices capable of measuring static pressure gas parameters, and most of the devices are simple in function, low in adjustable precision and excessive in human factors, so that the result of exploring the gas film parameters is greatly influenced.
Disclosure of Invention
The invention provides a high-stability plane air film parameter measuring device aiming at the current static pressure gas research situation.
The invention comprises a scale wheel pointer, a scale wheel connecting piece, a screw rod supporting side plate, a force unloading column, a central body, a pipe clamp, an upper cross beam, a compression spring, a cross beam bracket, a force unloading plate, a spring expansion adjusting ring, a supporting square column, a temperature sensor, a lower bottom plate, a device roller, an adjustable base, a transverse motor guide rail, a longitudinal motor guide rail, a pressure sensor, a working platform, a double U-shaped throttle, a back-off connecting shaft piece, a displacement sensor, a magnetic gauge stand, a pipe sleeve, a guide rail sliding block, a directional guide rail, a screw rod supporting upper top plate, a screw rod connecting shaft piece and an adjusting hand wheel.
The adjusting device is characterized in that the topmost end of the screw connecting shaft piece is connected with the adjusting hand wheel, the adjusting hand wheel sequentially penetrates through the scale wheel pointer, the scale wheel connecting piece and the screw supporting upper top plate and then is connected with the screw, the screw supporting upper top plate and the screw supporting side plate are fixedly connected with the upper cross beam, the upper end of the central body is in threaded fit with the screw, the directional guide rail is installed on the screw supporting side plate on one side, and the central body is fixedly connected with the directional guide rail through the guide rail sliding block.
The top end of the back-off connecting shaft piece is connected with the lower end of the central body in a back-off mode, the back-off connecting shaft piece sequentially penetrates through the compression spring, the spring expansion adjusting ring and the force unloading plate and then is connected with the double-U-shaped throttler, the pipe clamp is installed at a port of the pipe sleeve, the pipe sleeve is installed at two sides of the upper cross beam, the force unloading column penetrates through the pipe sleeve and is fixedly connected with the force unloading plate, the measuring head of the displacement sensor is in contact with the upper surface of the force unloading plate, and the measuring head of the displacement sensor is connected with the lower surface of the upper cross beam through the magnetic gauge stand.
The lower bottom plate pass through the support square column with entablature fixed connection, crossbeam support both ends connect respectively entablature with the support square column, the lower bottom plate install adjustable base with the device gyro wheel, horizontal motor guide rail with vertical motor guide rail install the lower bottom plate upper surface after coincide from top to bottom, work platform install vertical motor guide rail top to install temperature sensor and pressure sensor.
When in operation, the device comprises: loosening the pipe clamp, rotating the adjusting hand wheel, driving the center body to move up and down by the screw rod, driving the back-off connecting shaft piece to move up and down by the center body, finally controlling the throttle to move up and down, completing the position adjustment of the throttle, tightening the pipe clamp, fixing the position of the unloading column, finally fixing the position of the throttle through the unloading plate, sending pulse signals to the motor by the upper computer, controlling the motor to move, reading displacement sensor data, temperature sensor data and pressure sensor data in the moving process of the motor, drawing a two-dimensional distribution diagram of the temperature and the pressure of the air film at a software interface, ending the measurement, stopping sending pulse signals to the motor by the upper computer, continuing sending reset pulse signals, enabling the motor guide rail to return to the original measuring position, and ending the measurement.
The invention adopts the design concept that the air pressure bearing module and the air film adjusting module are separated, and the two modules are connected through the compression spring, so that not only is the abrasion of the screw rod reduced, but also the stability of the air film is greatly improved, the return error caused by air inlet of the throttle is reduced, and meanwhile, the automatic measurement is completed by adopting upper computer software, so that the interference of human factors is reduced to the minimum extent.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic diagram of a control system of the present invention;
FIG. 3 is a flow chart of the operation of the present invention for performing a measurement;
FIG. 4 is a flow chart of the execution of the software of the present invention;
fig. 5 is a diagram showing an example of the effect of the measurement result of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the invention comprises a scale wheel pointer 1, a scale wheel 2, a scale wheel connecting piece 3, a screw rod supporting side plate 4, a force unloading column 5, a central body 6, a pipe clamp 7, an upper cross beam 8, a compression spring 9, a cross beam bracket 10, a force unloading plate 11, a spring telescopic adjusting ring 12, a supporting square column 13, a temperature sensor 14, a lower bottom plate 15, a device roller 16, an adjustable base 17, a transverse motor guide rail 18, a longitudinal motor guide rail 19, a pressure sensor 20, a working platform 21, a double-U-shaped throttle 22, a back-off connecting shaft piece 23, a displacement sensor 24, a magnetic gauge stand 25, a pipe sleeve 26, a guide rail sliding block 27, a directional guide rail 28, a screw rod 29, a screw rod supporting upper top plate 30, a screw rod connecting shaft piece 31 and an adjusting hand wheel 32.
The top end of the screw rod connecting shaft piece is connected with the adjusting hand wheel, the adjusting hand wheel sequentially penetrates through the scale wheel pointer, the scale wheel connecting piece and the screw rod to support the upper top plate and then is connected with the screw rod, the screw rod to support the upper top plate and the screw rod to support the side plate to be fixedly connected with the upper cross beam, the upper end of the central body is in threaded fit with the screw rod, the directional guide rail is installed on the screw rod supporting side plate on one side, and the central body is fixedly connected with the directional guide rail through the guide rail sliding block.
The top end of the back-off connecting shaft piece is connected with the lower end of the central body in a back-off mode, the back-off connecting shaft piece sequentially penetrates through the compression spring, the spring expansion adjusting ring and the force unloading plate and then is connected with the throttle, the pipe clamp is installed at the pipe sleeve port, the pipe sleeve is installed at two sides of the upper cross beam, the force unloading column penetrates through the pipe sleeve and is fixedly connected with the force unloading plate, the measuring head of the displacement sensor is in contact with the upper surface of the force unloading plate, and the displacement sensor is connected with the lower surface of the upper cross beam through the magnetic gauge stand.
The lower bottom plate pass through the support square column with entablature fixed connection, crossbeam support both ends connect respectively entablature with the support square column, the lower bottom plate install adjustable base with the device gyro wheel, horizontal motor guide rail with vertical motor guide rail install the lower bottom plate upper surface after coincide from top to bottom, work platform install vertical motor guide rail top to install temperature sensor and pressure sensor.
As shown in fig. 2, the control system of the present invention comprises an upper computer, a temperature sensor, a pressure sensor, a displacement sensor, a transverse motor guide rail and a longitudinal motor guide rail.
As shown in fig. 3, the workflow of the present invention for performing a measurement is: loosening the pipe clamp, rotating the adjusting hand wheel, driving the center body to move up and down by the screw rod, driving the back-off connecting shaft piece to move up and down by the center body, finally controlling the throttle to move up and down, completing the position adjustment of the throttle, tightening the pipe clamp, fixing the position of the unloading column, finally fixing the position of the throttle through the unloading plate, sending pulse signals to the motor by the upper computer, controlling the motor to move, reading displacement sensor data, temperature sensor data and pressure sensor data in the moving process of the motor, drawing a two-dimensional distribution diagram of the temperature and the pressure of the air film at a software interface, ending the measurement, stopping sending pulse signals to the motor by the upper computer, continuing sending reset pulse signals, enabling the motor guide rail to return to the original measuring position, and ending the measurement.
As shown in fig. 4, the software implementation program of the present invention includes the following processing steps:
the first step, entering a data acquisition interface, clicking a start button, and starting to acquire data;
reading the displacement sensor data, storing, circularly judging whether the data is stored, judging the set times continuously in a circulating way, judging that the data is not stored as a result, and returning to the process of collecting the displacement sensor data again;
thirdly, the upper computer software LabVIEW sends a motor guide rail starting signal;
fourthly, the upper computer software continues to send a motor guide rail movement fixed pulse signal;
fifthly, stopping sending the moving pulse signal after the fixed pulse signal is sent, and collecting temperature and pressure signals at the same time;
step six, circularly judging whether the single-point temperature and pressure signals are acquired according to the set times, if so, executing the next step, and if not, continuously transmitting motor guide rail pulse signals to acquire the next data signals;
a seventh step of circularly judging whether all the signals are acquired according to the set times after the single-point signals are acquired, executing the next step if the acquisition is completed, and repeatedly executing the fourth, fifth, sixth and seventh steps if the acquisition is not completed;
eighth step, finishing sending the motor guide rail movement pulse signal, and drawing the air film field temperature and pressure distribution diagram;
and ninth, drawing is completed, a motor guide rail reset pulse signal is sent, resetting is completed, and measurement is finished.
As shown in FIG. 5, in the measurement result of the present invention, a cloud image of the air film field pressure distribution was obtained under the experimental conditions of an air film thickness of 6 μm and an air supply pressure of 0.4 MPa.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (3)
1. High stability plane air film parameter measurement device, including scale wheel pointer, scale wheel connecting piece, lead screw support curb plate, unload the power post, the center body, the pipe clamp, the entablature, compression spring, the crossbeam support, unload the power board, the flexible adjusting ring of spring, support square post, temperature sensor, the lower plate, two degree of freedom mechanisms, pressure sensor, work platform, two U type throttlers, back-off connecting axle spare, displacement sensor, magnetism gauge stand, the pipe box, the guide rail slider, directional guide rail, the lead screw supports roof, lead screw connecting axle spare and regulating hand wheel, its characterized in that:
the top end of the screw rod connecting shaft piece is connected with an adjusting hand wheel, the adjusting hand wheel sequentially passes through the scale wheel pointer, the scale wheel connecting piece and the screw rod supporting upper top plate and then is connected with the screw rod, the screw rod supporting upper top plate and the screw rod supporting side plate are fixedly connected with the upper cross beam, the upper end of the central body is in threaded fit with the screw rod, the directional guide rail is arranged on one side of the screw rod supporting side plate, and the central body is fixedly connected with the directional guide rail through the guide rail sliding block;
the top end of the back-off connecting shaft piece is connected with the lower end of the central body in a back-off manner, sequentially passes through the compression spring, the spring expansion adjusting ring and the force-unloading plate and then is connected with the double U-shaped throttler, the pipe clamp is arranged at the port of the pipe sleeve, the pipe sleeve is arranged at two sides of the upper cross beam, the force-unloading column passes through the pipe sleeve and is fixedly connected with the force-unloading plate, and the measuring head of the displacement sensor is contacted with the upper surface of the force-unloading plate and is connected with the lower surface of the upper cross beam through the magnetic gauge stand;
the lower bottom plate is fixedly connected with the upper cross beam through the supporting square column, two ends of the cross beam support are respectively connected with the upper cross beam and the supporting square column, and the working platform is arranged above the two-degree-of-freedom mechanism and is provided with the temperature sensor and the pressure sensor.
2. The high stability planar air film parameter measurement device of claim 1, wherein: the adjustable base and the device roller are mounted on the lower bottom plate.
3. The high stability planar air film parameter measurement device of claim 1, wherein: the two-degree-of-freedom mechanism comprises a transverse motor guide rail and a longitudinal motor guide rail, and the transverse motor guide rail and the longitudinal motor guide rail are arranged on the upper surface of the lower bottom plate after being overlapped up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268506.9A CN108535413B (en) | 2018-03-29 | 2018-03-29 | High-stability plane air film parameter measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268506.9A CN108535413B (en) | 2018-03-29 | 2018-03-29 | High-stability plane air film parameter measuring device |
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| CN108535413A CN108535413A (en) | 2018-09-14 |
| CN108535413B true CN108535413B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810268506.9A Active CN108535413B (en) | 2018-03-29 | 2018-03-29 | High-stability plane air film parameter measuring device |
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| CN112629809B (en) * | 2020-12-21 | 2024-03-26 | 中国计量大学 | Gas film parameter measuring device of segmented shaft type gas curved surface static pressure throttle |
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