A detachable curved surface static pressure throttling air film parameter measurement device and method

Abstract

The present invention discloses a detachable curved surface static pressure throttle air film parameter measurement device and method, which can realize automatic three-dimensional scanning and acquisition of air film micro-flow field parameters of curved surface gas static pressure throttle. The present invention includes: a curved surface throttle, a temperature sensor, a pressure sensor, a curved surface workbench, an optical axis, a bearing seat, a measuring base, a support column, an air film thickness adjustment mechanism, an auxiliary fixing block, a locking block, a rotating motor, a connecting plate, a longitudinal adjustment guide rail, a transverse feed guide rail, and a base. The present invention is aimed at curved surface gas static pressure throttles with different radii, and only different auxiliary fixing blocks and curved surface workbenches need to be replaced to realize the air film parameter measurement of different curved surface gas static pressure throttles, and the applicability is high.

Description

Technical Field

[0001] The invention belongs to the field of ultra-precision gas static pressure lubrication, and in particular to a detachable curved surface static pressure throttle gas film parameter measuring device and method. Background Art

[0002] Gas hydrostatic lubrication technology has been widely used in the fields of ultra-precision machining and ultra-precision testing in modern times due to its advantages of high precision, low vibration, high reusability and low pollution. In some occasions that require high-precision rotation and displacement functions, gas hydrostatic lubrication is mostly used as its support method. At present, there are technical difficulties in the field of gas hydrostatic lubrication, such as poor stiffness and stability, and small load-bearing capacity. In order to study and solve these problems, many experts and scholars have studied the gas hydrostatic air film flow field.

[0003] As far as the current situation is concerned, due to the shortage of measuring devices and equipment, most of the research on gas static pressure film flow field is carried out by fluid simulation. Only a very small number of universities in China have devices that can measure static pressure film parameters, and most of them are for the measurement of plane film parameters. For the measurement of curved throttle film parameters, there is no device that can realize global measurement. The detachable gas curved surface static pressure throttle film parameter measurement device can realize the automatic measurement of film parameters for curved throttles of different radii. Summary of the invention

[0004] In view of the current research status of gas static pressure lubrication technology, the invention provides a detachable curved surface static pressure throttle gas film parameter measuring device.

[0005] The invention comprises a curved surface rotation measuring mechanism, a two-dimensional guide rail, an air film thickness adjusting mechanism, a supporting column and a base;

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

[0007] The curved workbench is a detachable structure, connected to the auxiliary fixing block by screws; the curvature radius of the measuring surface of the curved workbench matches the curvature radius of the curved throttle, and has two threaded holes for installing the temperature sensor and the pressure sensor; one side of the locking block is an arc surface, which is tightly fitted with the same radius as the optical axis; the other side has a threaded hole, which is connected to the auxiliary fixing block by screws;

[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 workbench.

[0009] The air film thickness adjustment mechanism is used to adjust the gap between the curved throttle and the curved workbench to adjust the air film thickness; 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 curved surface workbench. The film thickness of the curved surface throttle is adjusted by the air film thickness adjustment mechanism 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 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 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 rotating mechanism to realize global scanning measurement of the air film micro-flow field parameters of a curved surface gas static pressure throttle. The rotating optical axis and the curved surface workbench are separated in design, and the auxiliary fixing block and the locking block are fixedly connected to realize good detachability of the curved surface workbench, so that the air film parameters of curved surface throttles with different radii can be measured, and the method has high applicability. 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 assembly diagram of the curved surface workbench of the present invention;

[0015] Figure 4 It is a work flow chart of the present invention completing a measurement; DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 Figure 2 As shown, the present invention includes: a curved throttle 1, a temperature sensor 2, a pressure sensor 3, a curved workbench 4, an optical axis 5, a bearing seat 6, a measuring base 7, a support column 8, an air film thickness adjustment mechanism 9, an auxiliary fixing block 10, a locking block 11, a rotating motor 12, a connecting plate 3, a longitudinal adjustment guide rail 14, a transverse feed guide rail 15, and a base 16.

[0018] 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.

[0019] The air film thickness adjustment mechanism is used to adjust the gap between the curved throttle and the curved workbench to adjust the air film thickness; the support column and the base support and carry the entire device.

[0020] like Figure 2 As shown, the curved surface rotation measuring mechanism includes a curved surface workbench, a bearing seat, a rotating motor, a temperature sensor, a pressure sensor, an optical axis, a measuring base, an auxiliary fixing block, and a locking block; the curved surface rotation measuring mechanism is connected and fixed on the two-dimensional guide rail through the measuring base and the connecting plate;

[0021] like Figure 3 As shown, the curved workbench is a detachable structure, which is connected to the auxiliary fixing block by screws; the curvature radius of the measuring surface of the curved workbench matches the curvature radius of the curved throttle, and has two threaded holes for installing the temperature sensor and the pressure sensor; one side of the locking block is an arc surface, which is tightly fitted with the same radius as the optical axis; the other side has a threaded hole, which is connected to the auxiliary fixing block by screws;

[0022] like Figure 4As 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 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 curved surface workbench. The film thickness of the curved surface throttle is adjusted by the film thickness adjustment mechanism 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 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.

[0023] 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. A detachable curved surface static pressure throttle air film parameter measuring device, characterized in that: It includes a curved surface rotation measuring mechanism, a two-dimensional guide rail, an air film thickness adjustment mechanism, a support column and a base; The curved surface rotation measuring mechanism comprises a curved surface workbench, a bearing seat, a rotating motor, a temperature sensor, a pressure sensor, an optical axis, a measuring base, an auxiliary fixing block, and a locking block; the curved surface rotation measuring mechanism is connected and fixed on the two-dimensional guide rail through the measuring base and the connecting plate; The curved workbench is a detachable structure, connected to the auxiliary fixing block by screws; the curvature radius of the measuring surface of the curved workbench matches the curvature radius of the curved throttle, and has two threaded holes for installing the temperature sensor and the pressure sensor; One side of the locking block is an arc surface, which is tightly fitted with the same radius as the optical axis; the other side is provided with a threaded hole, which is connected to the auxiliary fixing block by screws.

2. A method for measuring air film parameters of a detachable curved static pressure throttle, using the measuring device according to claim 1, characterized in that: A detachable curved 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 process is 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 curved surface workbench; The air film thickness of the curved throttle is adjusted by the air film thickness adjustment mechanism to fix the curved throttle; 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 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 reaches the axial boundary of the air film. If it does not reach the axial boundary, the transverse feed guide moves and the rotation measurement is repeated. If the axial boundary of the air film is reached, the host computer stops sending fixed pulse signals, stops data collection, resets all motors, and the measurement ends.

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