An integrated shaft-type curved surface static pressure throttle gas film parameter measurement device and method

Abstract

The present invention discloses an integrated shaft-type curved surface static pressure throttle air film parameter measurement device and method, which can automatically perform three-dimensional scanning and collection of air film micro-flow field parameters. The present invention includes: a curved surface workbench base, a bearing seat, an optical axis curved surface workbench, a coupling, a curved surface throttle, a rotating motor, a reducer, a temperature sensor, a pressure sensor, a two-dimensional guide rail, a Z-direction feeding mechanism, a base, and a support column. The optical axis curved surface workbench is an integrated structure, a rectangular surface is cut out of the bottom surface, and a certain depth is hollowed out inward, and two threaded holes are opened to facilitate the installation of temperature sensors and pressure sensors. The present invention provides an experimental device for realizing the measurement of curved surface throttle air film micro-flow field parameters, which has certain practicality and reference value.

Description

Technical Field

[0001] The invention belongs to the field of ultra-precision gas static pressure lubrication, and specifically relates to a device and method for measuring gas film parameters of an integrated shaft-type curved surface static pressure throttle. Background Art

[0002] Gas hydrostatic lubrication technology has the advantages of high reuse rate and cleanliness. In modern times, it has been widely used as a lubrication device in bearing technology in the aerospace, medical services, electronic technology, marine engineering, and nuclear energy development industries. There are small air supply holes on the surface of the bearing sleeve. During the operation of the rolling shaft, the gas passes through the small air supply holes on the bearing sleeve to form high pressure and enters between the bearing sleeve and the rolling shaft to play a lubricating role. Therefore, the study of the air film parameters formed by the curved surface gas lift hydrostatic throttle is very necessary for gas hydrostatic lubrication technology.

[0003] As far as the current situation is concerned, only a very small number of universities in China have devices that can measure static pressure air film parameters, and most of them are for the measurement of plane air film parameters. For the measurement of curved throttle air film parameters, there is no device that can achieve global measurement. The present invention provides an integrated shaft-type curved surface static pressure throttle air film parameter measurement device and method, which realizes the automatic measurement of the pressure and temperature parameters of the curved throttle air film micro-flow field. Summary of the invention

[0004] In view of the current research status of gas static pressure lubrication technology, the present invention provides a device and method for measuring gas film parameters of an integrated shaft-type curved surface static pressure throttle.

[0005] The present invention comprises a curved surface rotation measuring mechanism, a two-dimensional guide rail, a Z-direction feeding mechanism, a supporting column and a base;

[0006] The curved surface rotation measuring mechanism comprises a curved surface workbench base, a bearing seat, an optical axis curved surface workbench, a coupling, a rotating motor, a temperature sensor, and a pressure sensor; the curved surface rotation measuring mechanism is fixed on a two-dimensional guide rail through the curved surface workbench base;

[0007] The curvature radius of the measuring surface of the optical axis curved surface workbench matches the curvature radius of the curved surface throttle; the center angle of the optical axis curved surface workbench is twice the center angle of the curved surface throttle; the optical axis curved surface workbench is an integrated shaft structure, and a temperature sensor and a pressure sensor are installed inside; the optical axis curved surface workbench is installed on the curved surface workbench base through a bearing seat, and clockwise and counterclockwise rotation measurement is realized under the action of a rotating motor;

[0008] The two-dimensional guide rail includes a transverse feed guide rail and a longitudinal adjustment guide rail. During measurement, the transverse feed guide rail cooperates with the curved surface rotation measurement mechanism to complete the measurement path of the curved surface throttle air film. The longitudinal adjustment guide rail is used to adjust the longitudinal position of the curved surface rotation measurement mechanism.

[0009] The Z-direction feeding mechanism is used to adjust the gap between the curved throttle and the optical axis curved workbench to adjust the thickness of the air film; the support column and the base support and carry the entire device.

[0010] The working process of the present invention is: turn on the power supply, the host computer sends a pulse signal to the longitudinal adjustment guide rail motor, controls the movement of the guide rail, and adjusts the longitudinal position of the curved surface rotation measurement mechanism; the host computer sends a pulse signal to the transverse feed guide rail to adjust the initial position; the host computer sends a pulse signal to the rotating motor to adjust the initial position of the optical axis curved surface workbench. The thickness of the curved surface throttle air film is adjusted by the Z-direction feed structure to fix the curved surface throttle. The host computer adjusts the air supply pressure through the air source pressure control program. The host computer sends a fixed pulse signal to the rotating motor and the transverse feed motor, the optical axis curved surface workbench rotates, the host computer reads the pressure sensor data and the temperature sensor data, and when the sensor reaches the radial boundary of the air film, it is determined whether it reaches the axial boundary of the air film. If it does not reach the axial boundary, the transverse feed guide rail moves and the rotation measurement is repeated; if it reaches the axial boundary of the air film, the host computer stops sending the fixed pulse signal, stops data collection, all motors are reset, and the measurement ends.

[0011] The beneficial effects of the present invention are as follows: the present invention adopts a method of cooperating feeding of a lateral feed guide rail and a curved surface rotation measuring mechanism to achieve global measurement of the micro-flow field parameters of the curved surface static pressure throttle. The rotating optical axis and the curved surface workbench are designed as an integrated axis, which better guarantees the cylindricality and coaxiality tolerances of the curved surface rotation measuring mechanism during measurement. At the same time, the upper computer software is used to complete the automatic measurement, which minimizes the influence of human factors on the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural diagram of the present invention as a whole;

[0013] Figure 2 It is a three-dimensional structural diagram of the curved surface rotation measuring mechanism of the present invention;

[0014] Figure 3 It is a structural diagram of the optical axis curved surface workbench of the present invention;

[0015] Figure 4 It is the principle diagram of the control system of the present invention;

[0016] Figure 5 It is a work flow chart of the present invention completing a measurement; DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 Figure 2 As shown, the present invention includes: a curved throttle 1, an optical axis curved workbench 2, a support column 3, a bearing seat 4, a curved workbench base 5, a longitudinal adjustment guide rail 6, a base 7, a Z-direction feeding mechanism 8, a temperature sensor 9, a pressure sensor 10, a coupling 11, a rotating motor 12, a reducer 13, and a transverse feeding structure 14.

[0019] like Figure 2 As shown, the curved surface rotation measuring mechanism includes a curved surface workbench base, a bearing seat, an optical axis curved surface workbench, a coupling, a curved surface throttle, a rotating motor, a temperature sensor, a pressure sensor, and a control card; the curved surface rotation measuring mechanism is fixed on the two-dimensional guide rail through the curved surface workbench base.

[0020] like Figure 3 As shown, the curvature radius of the measuring surface of the optical axis curved surface workbench matches the curvature radius of the curved surface throttle; the central angle of the optical axis curved surface workbench is twice the central angle of the curved surface throttle; the optical axis curved surface workbench is an integrated structure of the optical axis and the curved surface workbench, and a temperature sensor and a pressure sensor are installed inside; the optical axis curved surface workbench is installed on the curved surface workbench base through a bearing seat, and clockwise and counterclockwise rotation measurement is realized under the action of a motor.

[0021] The two-dimensional guide rail includes a transverse feed guide rail and a longitudinal adjustment guide rail; during measurement, the transverse feed guide rail cooperates with the curved surface rotation measurement mechanism to complete the measurement path of the curved surface throttle air film. The longitudinal adjustment guide rail is used to adjust the longitudinal position of the curved surface rotation measurement mechanism.

[0022] The Z-direction feeding mechanism is used to adjust the gap between the curved throttle and the optical axis curved workbench to adjust the thickness of the air film; the support column and the base support and carry the entire device.

[0023] like Figure 4 As shown, the control system of the present invention includes: a host computer, a transverse motor guide rail, a longitudinal motor guide rail, a rotating motor, an air supply pressure control, a temperature sensor, and a pressure sensor;

[0024] like Figure 5As shown, the workflow of the present invention to complete a measurement is: turn on the power supply, the host computer sends a pulse signal to the longitudinal adjustment guide rail motor, controls the guide rail to move, and adjusts the longitudinal position of the curved surface rotation measurement mechanism; the host computer sends a pulse signal to the transverse feed guide rail to adjust the initial position; the host computer sends a pulse signal to the rotating motor to adjust the initial position of the optical axis curved surface workbench. The thickness of the curved surface throttle air film is adjusted by the Z-direction feed structure to fix the curved surface throttle. The host computer adjusts the air supply pressure through the air source pressure control program. The host computer sends a fixed pulse signal to the rotating motor and the transverse feed motor, the optical axis curved surface workbench rotates, the host computer reads the pressure sensor data and the temperature sensor data, and when the sensor reaches the radial boundary of the air film, it determines whether it reaches the axial boundary of the air film. If it does not reach the axial boundary, the transverse feed guide rail moves and repeats the rotation measurement; if it reaches the axial boundary of the air film, the host computer stops sending the fixed pulse signal, stops data collection, all motors reset, and the measurement ends.

[0025] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An integrated shaft-type curved surface static pressure throttle gas film parameter measuring device, characterized in that: It includes a curved surface rotation measuring mechanism, a two-dimensional guide rail, a Z-direction feeding mechanism, a supporting column and a base; The curved surface rotation measuring mechanism comprises a curved surface workbench base, a bearing seat, an optical axis curved surface workbench, a coupling, a rotating motor, a temperature sensor, and a pressure sensor; the curved surface rotation measuring mechanism is fixed on a two-dimensional guide rail through the curved surface workbench base; The two-dimensional guide rail includes a transverse feed guide rail and a longitudinal adjustment guide rail; during measurement, the transverse feed guide rail cooperates with the curved surface rotation measurement mechanism to jointly complete the measurement path of the curved surface throttle air film; the longitudinal adjustment guide rail is used to adjust the longitudinal position of the curved surface rotation measurement workbench; The Z-direction feeding mechanism is used to adjust the gap between the curved throttle and the optical axis curved workbench to adjust the thickness of the air film; The support column and the base support and carry the entire device; The optical axis curved surface workbench is in the shape of a stepped axis, the curvature radius of its measuring surface matches the curvature radius of the curved surface throttle, and the length of the measuring surface is between two and three times that of the curved surface throttle; the central angle of the measuring surface of the optical axis curved surface workbench should be more than twice the central angle of the working surface of the curved surface throttle; The optical axis curved surface workbench is an integrated structure, a rectangular surface is cut out of the bottom surface, and a certain depth is hollowed out inward, with two threaded holes, which are convenient for installing temperature sensors and pressure sensors; the optical axis curved surface workbench is installed on the curved surface workbench base through a bearing seat, and clockwise and counterclockwise rotation measurement can be achieved under the action of a rotating motor.

2. A method for measuring air film parameters of an integrated shaft-type curved surface static pressure throttle, using the measuring device according to claim 1, characterized in that: An integrated optical axis curved surface workbench with a sensor installed and the same curvature radius as the curved throttle is used. The swing scanning measurement of the curved throttle air film parameters is achieved by cooperating with a rotating motor and a linear displacement guide rail. The specific steps are as follows: turn on the power, the host computer sends a pulse signal to the longitudinal adjustment guide rail motor to control the movement of the guide rail and adjust the longitudinal position of the curved surface rotation measurement mechanism; the host computer sends a pulse signal to the transverse feed guide rail to adjust the initial position; the host computer sends a pulse signal to the rotation motor to adjust the initial position of the optical axis curved surface workbench; The air film thickness of the curved surface restrictor is adjusted by the Z-direction feeding structure to fix the curved surface restrictor; The upper computer adjusts the gas supply pressure through the gas source pressure control program; The host computer sends fixed pulse signals to the rotating motor and the transverse feed motor, the optical axis curved worktable rotates, and the host computer reads the pressure sensor data and the temperature sensor data. When the sensor reaches the radial boundary of the air film, it determines whether it has reached the axial boundary of the air film. If it has not reached the axial boundary, the transverse feed guide moves and the rotation measurement is repeated; if it reaches the axial boundary of the air film, the host computer stops sending fixed pulse signals, stops data collection, resets all motors, and the measurement ends.

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