CN112629810A

CN112629810A - Air film parameter measuring device and method for integrated shaft type curved surface static pressure restrictor

Info

Publication number: CN112629810A
Application number: CN202011514837.XA
Authority: CN
Inventors: 刘雨航; 沈小燕; 李东升; 禹静; 尹健龙; 刘源
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-04-09

Abstract

The invention discloses an air film parameter measuring device and method of an integrated shaft type curved surface static pressure restrictor, which can automatically perform three-dimensional scanning acquisition on air film microflow field parameters. The invention comprises the following steps: the device comprises a curved surface workbench base, a bearing seat, an optical axis curved surface workbench, a coupler, a curved surface restrictor, a rotating motor, a speed 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 of an integrated structure, a rectangular surface is cut out of the bottom surface, a certain depth is hollowed inwards, and the workbench is provided with two threaded holes, so that a temperature sensor and a pressure sensor can be conveniently mounted. The invention provides an experimental device for realizing measurement of the parameters of the gas film micro-flow field of the curved surface restrictor, and has certain practicability and referential property.

Description

Air film parameter measuring device and method for integrated shaft type curved surface static pressure restrictor

Technical Field

The invention belongs to the field of ultra-precise gas static pressure lubrication, and particularly relates to an integrated shaft type device and method for measuring parameters of a gas film of a curved surface static pressure restrictor.

Background

The gas static pressure lubrication technology has the advantages of high reuse rate, cleanness and no pollution, so the gas static pressure lubrication technology is widely used in lubrication devices in the bearing technology recently, and is applied to the industries of aerospace, medical service, electronic technology, ocean engineering, nuclear energy development and the like. The surface of the bearing sleeve is provided with air supply small holes, and in the running process of the rolling shaft, air passes through the air supply small holes on the bearing sleeve to form high pressure and enters between the bearing sleeve and the rolling shaft to play a role in lubrication. Therefore, the research on the parameters of the air film formed by the curved-surface stripping static-pressure restrictor is necessary for the gas static-pressure lubrication technology.

At present, only few colleges and universities in China have devices capable of measuring static pressure air film parameters, and most of the devices are used for measuring plane air film parameters, and no device equipment capable of realizing global measurement is provided for measuring air film parameters of a curved surface restrictor. The invention provides an integrated shaft type device and a method for measuring air film parameters of a curved surface static pressure restrictor, which are used for automatically measuring the pressure and temperature parameters of an air film micro-flow field of the curved surface restrictor.

Disclosure of Invention

The invention provides an integrated shaft type curved surface static pressure restrictor air film parameter measuring device and method aiming at the current research situation of the air static pressure lubrication technology.

The device comprises 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 coupler, a rotating motor, a temperature sensor and a pressure sensor; the curved surface rotation measuring mechanism is fixed on the two-dimensional guide rail through a curved surface workbench base;

the curvature radius of the measuring surface of the optical axis curved surface workbench is matched with the curvature radius of the curved surface throttleer; the central angle of the optical axis curved surface workbench is twice that of the curved surface throttler; the optical axis curved surface workbench is of an integrated axial structure, and a temperature sensor and a pressure sensor are arranged in the optical axis curved surface workbench; the optical axis curved surface workbench is arranged on a curved surface workbench base through a bearing seat, and clockwise and anticlockwise rotation measurement is realized under the action of a rotating motor;

the two-dimensional guide rail comprises a transverse feeding guide rail and a longitudinal adjusting guide rail; during measurement, the transverse feeding guide rail and the curved surface rotation measuring mechanism are matched to jointly complete the measurement path of the air film of the curved surface restrictor. The longitudinal adjusting guide rail is used for adjusting the longitudinal position of the curved surface rotation measuring mechanism;

the Z-direction feeding mechanism is used for adjusting the size of a gap between the curved surface throttler and the optical axis curved surface workbench so as to adjust the thickness of an air film; the supporting column and the base support and bear the whole device.

The working process of the invention is as follows: starting a power supply, sending a pulse signal to a longitudinal adjusting guide rail motor by an upper computer, controlling the guide rail to move, and adjusting the longitudinal position of the curved surface rotation measuring mechanism; the upper computer sends a pulse signal to the transverse feeding guide rail to adjust the initial position; the upper computer sends a pulse signal to the rotating motor to adjust the initial position of the optical axis curved surface workbench. And the thickness of the air film of the curved surface restrictor is adjusted through the Z-direction feeding structure, and the curved surface restrictor is fixed. The upper computer adjusts the air supply pressure through an air source pressure control program. The upper computer sends fixed pulse signals to the rotating motor and the transverse feeding motor, the optical axis curved surface workbench rotates, the upper computer reads data of the pressure sensor and data of the temperature sensor, judges whether the sensor reaches an axial boundary of the air film after reaching the radial boundary of the air film, and moves the transverse feeding guide rail if the sensor does not reach the axial boundary, and the rotation measurement is repeated; and if the air film axial boundary is reached, the upper computer stops sending fixed pulse signals, stops data acquisition, resets all motors and finishes measurement.

The invention has the beneficial effects that: the invention adopts a mode of matching a transverse feeding guide rail and a curved surface rotation measuring mechanism for feeding, and realizes the global measurement of the parameters of the air film micro-flow field of the curved surface static pressure restrictor. The integrated axial design of the rotating optical axis and the curved surface workbench is adopted, the cylindricity and the coaxiality tolerance of the curved surface rotating measuring mechanism during measurement are better guaranteed, meanwhile, the automatic measurement is completed by adopting the software of an upper computer, and the influence of human factors on the measuring result is reduced to the greatest extent.

Drawings

FIG. 1 is an overall perspective view of the present invention;

FIG. 2 is a perspective view of the curved surface rotation measuring mechanism of the present invention;

FIG. 3 is a block diagram of an optical axis curved stage of the present invention;

FIG. 4 is a schematic diagram of the control system of the present invention;

FIG. 5 is a flow chart of the present invention for performing a measurement;

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present invention comprises: the device comprises a curved surface restrictor 1, an optical axis curved surface workbench 2, a support column 3, a bearing seat 4, a curved surface workbench base 5, a longitudinal adjusting guide rail 6, a base 7, a Z-direction feeding mechanism 8, a temperature sensor 9, a pressure sensor 10, a coupler 11, a rotating motor 12, a speed reducer 13 and a transverse feeding structure 14.

As shown in fig. 2, the curved surface rotation measuring mechanism includes a curved surface worktable base, a bearing seat, an optical axis curved surface worktable, a coupling, a curved surface restrictor, a rotation 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.

As shown in fig. 3, the curvature radius of the measuring surface of the optical axis curved surface workbench is matched with the curvature radius of the curved surface restrictor; the central angle of the optical axis curved surface workbench is twice that of the curved surface throttler; the optical axis curved surface workbench is of an integrated axial structure of an optical axis and a curved surface workbench, and a temperature sensor and a pressure sensor are arranged in the optical axis curved surface workbench; the optical axis curved surface workbench is arranged on a curved surface workbench base through a bearing seat, and clockwise and anticlockwise rotation measurement is realized under the action of a motor.

The two-dimensional guide rail comprises a transverse feeding guide rail and a longitudinal adjusting guide rail; during measurement, the transverse feeding guide rail and the curved surface rotation measuring mechanism are matched to jointly complete the measurement path of the air film of the curved surface restrictor. The longitudinal adjusting guide rail is used for adjusting the longitudinal position of the curved surface rotation measuring mechanism.

As shown in fig. 4, the control system of the present invention includes: the device comprises an upper computer, a transverse motor guide rail, a longitudinal motor guide rail, a rotating motor, an air supply pressure control device, a temperature sensor and a pressure sensor;

as shown in fig. 5, the workflow of completing one measurement in the present invention is: starting a power supply, sending a pulse signal to a longitudinal adjusting guide rail motor by an upper computer, controlling the guide rail to move, and adjusting the longitudinal position of the curved surface rotation measuring mechanism; the upper computer sends a pulse signal to the transverse feeding guide rail to adjust the initial position; the upper computer sends a pulse signal to the rotating motor to adjust the initial position of the optical axis curved surface workbench. And the thickness of the air film of the curved surface restrictor is adjusted through the Z-direction feeding structure, and the curved surface restrictor is fixed. The upper computer adjusts the air supply pressure through an air source pressure control program. The upper computer sends fixed pulse signals to the rotating motor and the transverse feeding motor, the optical axis curved surface workbench rotates, the upper computer reads data of the pressure sensor and data of the temperature sensor, judges whether the sensor reaches an axial boundary of the air film after reaching the radial boundary of the air film, and moves the transverse feeding guide rail if the sensor does not reach the axial boundary, and the rotation measurement is repeated; and if the air film axial boundary is reached, the upper computer stops sending fixed pulse signals, stops data acquisition, resets all motors and finishes measurement.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An integrated shaft type curved surface hydrostatic restrictor gas film parameter measuring device, characterized in that: it comprises a curved surface rotation measuring mechanism, a two-dimensional guide rail, a Z-direction feeding mechanism, a support column and a base;

The curved surface rotation measurement mechanism includes a curved surface table base, a bearing seat, an optical axis curved surface table, a coupling, a rotating motor, a temperature sensor, and a pressure sensor; the curved surface rotation measurement mechanism is fixed to the two through the curved surface table base. on the guide rail;

The two-dimensional guide rail includes a lateral feed guide rail and a longitudinal adjustment guide rail; during measurement, the lateral feed guide rail cooperates with the curved surface rotation measurement mechanism to jointly complete the measurement path of the curved surface restrictor air film; the longitudinal adjustment guide rail is used to adjust the curved surface rotation measurement work. the longitudinal position of the table;

The Z-direction feeding mechanism is used to adjust the size of the gap between the curved restrictor and the optical axis curved table so as to adjust the thickness of the gas film;

The supporting column and the base support and bear the entire device.

2 . The device for measuring gas film parameters of an integral axis curved surface static pressure restrictor according to claim 1 , wherein the optical axis curved surface table is in the shape of a stepped axis, and the curvature radius of the measuring surface is the same as the curved surface node. 3 . The radius of curvature of the flow restrictor is matched, and the length of the measuring surface is between two to three times of the curved restrictor; the central angle of the measuring surface of the optical axis curved workbench should be more than twice the central angle of the working surface of the curved restrictor.

3. The device for measuring gas film parameters of an integral axis curved hydrostatic restrictor according to claim 1, characterized in that: the optical axis curved worktable is of an integrated structure, and a rectangular surface is cut out from the bottom surface, and a rectangular surface is cut out from the bottom. The inside is hollowed out to a certain depth, and two threaded holes are opened to facilitate the installation of temperature sensors and pressure sensors; the optical axis curved table is installed on the base of the curved table through the bearing seat, and clockwise and Counterclockwise rotation measurement.

4. The method for measuring gas film parameters of an integral axis curved hydrostatic restrictor, using the measuring device according to claim 1, characterized in that: an integrated optical axis installed with a sensor and consistent with the curvature radius of the curved restrictor is adopted The curved worktable, through the combination of the rotating motor and the linear displacement guide rail, realizes the swing scanning measurement of the air film parameters of the curved restrictor. The specific steps are: turn on the power supply, the upper 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 surface rotation measuring mechanism; the upper computer sends a pulse signal to the transverse feed guide rail to adjust the initial position; Rotate the motor to send a pulse signal to adjust the initial position of the optical axis curved table. Adjust the air film thickness of the curved restrictor through the Z-direction feed structure, and fix the curved restrictor. The upper 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 table rotates, the host computer reads the pressure sensor data and temperature sensor data, and when the sensor reaches the radial boundary of the gas film, it determines whether it reaches the axial direction of the gas film. If the axial boundary is not reached, the lateral feed guide will move, and the measurement will be repeated; if the axial boundary of the air film is reached, the host computer will stop sending fixed pulse signals, stop data acquisition, reset all motors, and end the measurement.