High-precision vibration signal measuring device

Abstract

A high-precision vibration signal measuring device comprises a fixing plate, a linkage plate and a machine pedestal which are sequentially arranged from top to bottom. The fixing plate is used for installing a rotating workpiece. The linkage plate is connected with the fixing plate through a transmission frame, and a radial vibration sensor connected with the transmission frame is installed on the linkage plate. The machine base is connected with the linkage plate through an elastic supporting piece, and an axial vibration sensor connected with the linkage plate is installed on the machine base. A vibration signal generated by rotating a workpiece is differentiated into a radial signal and an axial signal in the transmission process, the radial signal causes the transmission frame to deform to extrude the radial vibration sensor, so that the radial vibration sensor completes signal pickup, and the axial signal causes the linkage plate to swing to extrude the axial vibration sensor, so that the axial vibration sensor completes signal pickup; according to the structure, the fixed plate, the linkage plate and the machine base which are arranged in a layered mode are connected through the transmission frame and the elastic supporting piece, the possibility that radial signals and axial signals interfere with each other can be reduced, and the bearing capacity of the whole structure can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of measuring device, especially relate to a high accuracy vibration signal measuring device. BACKGROUND

[0002] The rotating parts such as rotor exist unbalance after manufacturing, and vibration will be generated in the use process, which influences the operation of mechanism and cannot reach the design requirement, so the rotating parts need to be dynamically balanced before assembly, and professional measuring device needs to be used for dynamic balance measurement, and the existing measuring device is various, but the measuring precision is difficult to guarantee due to the limitation of structure.

[0003] Therefore, the applicant proposes a vibration signal measuring device in the utility model patent with the application number 2022231370607, which comprises a base and a fixing seat for placing a workpiece, an axial vibration sensor and a radial vibration sensor are installed on the base, and the base is connected with the base through a connecting rod, the fixing seat side is provided with an axial vibration transmission rod for fixing the axial vibration sensor, and the fixing seat bottom is provided with a radial vibration transmission block for fixing the radial vibration sensor, the rotating workpiece vibration signal is converted into radial signal and axial signal through the connecting rod, and then the radial signal and the axial signal are measured respectively, so that the vibration signal transmission is sensitive, and the detection precision is improved, but the following disadvantages are found in the actual use process.

[0004] Firstly, since the axial vibration sensor and the radial vibration sensor are on the same plane, the radial signal and the axial signal are converted in one plane, which may cause mutual interference of the two signals and affect the actual measurement precision.

[0005] Secondly, in order to ensure the signal transmission sensitivity between the fixing seat and the base, the connecting rod usually needs to be thin, which leads to the decrease of bearing capacity, and is only suitable for dynamic balance measurement of small workpieces, and the universality is poor. UTILITY MODEL CONTENTS

[0006] TECHNICAL PROBLEM SOLVED

[0007] The utility model provides a high accuracy vibration signal measuring device, which can solve the problems mentioned in the background art.

[0008] TECHNICAL SCHEME

[0009] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0010] A high-precision vibration signal measuring device, comprising a fixed plate, a linkage plate and a machine table base arranged in sequence from top to bottom: the fixed plate is used for installing a rotating workpiece; the linkage plate is connected to the fixed plate through a transmission frame, and a radial vibration sensor connecting the transmission frame is installed on the linkage plate; the machine table base is connected to the linkage plate through an elastic support member, and an axial vibration sensor connecting the linkage plate is installed on the machine table base.

[0011] Preferably, both the fixed plate and the linkage plate are located directly above the machine table base, and the rotating workpiece and the elastic support member are coaxially installed.

[0012] Preferably, the elastic support member can adopt a flexible hinge.

[0013] Preferably, the transmission frame includes two support plates, and the two support plates are symmetrically installed on two opposite sides of the linkage plate and synchronously connected to the fixed plate.

[0014] Preferably, the fixed plate is in a "囗" shape.

[0015] Preferably, the rotating workpiece is installed on the top surface of the fixed plate through a fastening bolt.

[0016] Preferably, a countersunk hole extending upward is formed at the bottom of the fixed plate, a threaded hole is provided at the bottom of the rotating workpiece, and one end of the fastening bolt can penetrate through the countersunk hole and connect to the threaded hole.

[0017] Preferably, the radial vibration sensor is horizontally arranged, and the axial vibration sensor is vertically arranged.

[0018] Preferably, a first limiting block is provided on the linkage plate, and the radial vibration sensor is connected to the first limiting block and the transmission frame through a first screw; a second limiting block is provided on the machine table base, and the axial vibration sensor is connected to the second limiting block and the linkage plate through a second screw.

[0019] (III) Beneficial effects

[0020] A high-precision vibration signal measuring device provided by the present utility model connects the hierarchically arranged fixed plate, linkage plate and machine table base by designing a transmission frame and an elastic support member, so that the radial vibration and axial vibration are structurally independent of each other to achieve static coupling separation, which is convenient for the radial vibration sensor and the axial vibration sensor to independently pick up radial signals and axial signals, reduces the possibility of mutual interference between the radial signal and the axial signal, and improves the measurement accuracy of the present measuring device; at the same time, the transmission frame and the elastic support member are used in cooperation, which can share the pressure exerted by the rotating workpiece on the fixed plate, thereby enhancing the bearing capacity of the overall structure and enabling the present measuring device to be applicable to rotating workpieces of various model specifications. Description of the drawings

[0021] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application, and in the drawings:

[0022] Figure 1 The overall structural schematic diagram of the present application is shown;

[0023] Figure 2 The left view of Figure 1 is shown;

[0024] Figure 3 The A-A sectional view of Figure 2 is shown;

[0025] Figure 4 The partial structural schematic diagram of the present application is shown;

[0026] Figure 5 The structural schematic diagram of the rotating workpiece and the fastening bolt of the present application is shown;

[0027] Figure 6 The structural schematic diagram of the elastic support of the present application is shown;

[0028] Figure 7 The structural schematic diagram of other embodiments of the elastic support of the present application is shown.

[0029] In the drawings: 1 fixed plate, 11 counterbore, 2 linkage plate, 21 transmission frame, 210 support plate, 22 first limiting block, 3 machine base, 31 elastic support, 32 second limiting block, 4 radial vibration sensor, 41 first screw, 5 axial vibration sensor, 51 second screw, 6 fastening bolt, P rotating workpiece, P1 threaded hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0031] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or a middle component can exist at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which the present application belongs. It should also be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0032] Reference to the accompanying drawings Figure 1 -Appendix Figure 6 A high-precision vibration signal measuring device, comprising a fixed plate 1, a linkage plate 2 and a machine base 3 arranged in sequence from top to bottom: the fixed plate 1 is used for mounting a rotating workpiece P; the linkage plate 2 is connected to the fixed plate 1 through a transmission frame 21, and the linkage plate 2 is provided with a radial vibration sensor 4 connected to the transmission frame 21; the machine base 3 is connected to the linkage plate 2 through an elastic support 31, and the machine base 3 is provided with an axial vibration sensor 5 connected to the linkage plate 2.

[0033] Specifically, during measurement, the rotating workpiece P to be measured is mounted on the fixed plate 1, and the rotating workpiece P is started, and the vibration signal generated by the rotating workpiece P is transmitted through the fixed plate 1, and is differentiated into radial signals and axial signals during transmission, the radial signals cause the transmission frame 21 to deform and press the radial vibration sensor 4, so that the radial vibration sensor 4 completes the pickup of the radial signals, and the axial signals cause the linkage plate 2 to swing and press the axial vibration sensor 5, so that the axial vibration sensor 5 completes the pickup of the axial signals.

[0034] In summary, the transmission frame 21 and the elastic support 31 are used to connect the fixed plate 1, the linkage plate 2 and the machine base 3 arranged in layers, so that the radial vibration and the axial vibration are independent in structure and realize static coupling separation, which facilitates the radial vibration sensor 4 and the axial vibration sensor 5 to independently pick up the radial signals and the axial signals, reduces the possibility of mutual interference between the radial signals and the axial signals, and improves the measurement accuracy of the measuring device; at the same time, the transmission frame 21 and the elastic support 31 are used in cooperation, which can share the pressure applied by the rotating workpiece P to the fixed plate 1, thereby improving the carrying capacity of the overall structure, so that the measuring device can be applied to rotating workpieces P of various specifications.

[0035] It should be noted that the rotating workpiece P can be a vane, a fan or the like with self-rotation function, or a motor rotor, a steam turbine rotor, a clock balance wheel or the like which needs to be driven to rotate by external force, and the utility model does not make any limitation on this; if the rotating workpiece P adopts a vane or the like, it can be directly installed on the fixing plate 1, and there is no need to additionally design a driving mechanism to drive it; if a motor rotor, a steam turbine rotor or the like is adopted, it needs to be rotatably installed on the fixing plate 1, and then an external driving mechanism (not shown in the figure) installed on the side of the fixing plate 1 is used to drive it.

[0036] Referring to the accompanying drawings Figure 1 - the accompanying drawings Figure 6 The fixing plate 1 and the linkage plate 2 are located directly above the machine base 3, and the rotating workpiece P is coaxially installed with the elastic support 31.

[0037] Specifically, the positions of the fixing plate 1, the linkage plate 2 and the machine base 3 are designed to be concentrated, so that the overall structure is more compact and the occupied space is reduced; and the rotating workpiece P is coaxially designed with the elastic support 31, so that the elastic support 31 can evenly share the pressure applied by the rotating workpiece P, improving the use stability of the overall structure.

[0038] Referring to the accompanying drawings Figure 3 - the accompanying drawings Figure 7 The elastic support 31 can adopt a flexible hinge or other components similar in structure to the flexible hinge and having the same effect, such as a ball joint with an internal spring, and the like, and the utility model does not make any limitation on this, and for the convenience of understanding, in the embodiment, the elastic support 31 adopts a flexible hinge.

[0039] The flexible hinge, also known as a flexible bearing or a cross spring bearing, is one of the elastic supports 31, which has a simple structure and a rotation center coinciding with the geometric center axis, and works by the limited deformation of the radially distributed elastic sheets; there are various types of flexible hinges on the market, such as the double-curved rod type hollow flexible hinge described in the invention patent with the application number CN100453830C, the flexible hinge described in the invention patent with the application number 2020110191551, and the asymmetric flexible hinge mentioned in the invention patent with the application number 2024107801606, and the like, and the specific reference is attached Figure 7 In the embodiment, no limitation is made on the type of flexible hinge.

[0040] Referring to the accompanying drawings Figure 1 - the accompanying drawings Figure 6 The transmission frame 21 includes two support plates 210, which are symmetrically installed on the two opposite sides of the linkage plate 2 and are synchronously connected to the fixing plate 1; this design makes the two sides of the fixing plate 1 and the linkage plate 2 bear force uniformly, so as to more stably transmit the vibration signal.

[0041] Refer to the attached Figure 1 - attached Figure 6 , the fixing plate 1 is in a "square" shape; this design enables the fixing plate 1 to have good deformation ability and recovery ability, so as to further improve the stability of vibration signal transmission.

[0042] Refer to the attached Figure 1 - attached Figure 6 , the rotating workpiece P is installed on the top surface of the fixing plate 1 through the fastening bolt 6. There are various methods for fixing through the fastening bolt 6. For the convenience of understanding, in this embodiment, a counterbore 11 extending upward is provided at the bottom of the fixing plate 1, a screw hole P 1 is provided at the bottom of the rotating workpiece P, and one end of the fastening bolt 6 can penetrate through the counterbore 11 and connect to the screw hole P 1; this design can realize the disassembly and assembly of the rotating workpiece P, which is convenient for users to install the rotating workpiece P for testing and disassemble and replace a new rotating workpiece P.

[0043] It should be noted that in addition to the above installation method, the rotating workpiece P can be detachably connected to the fixing plate 1 by means of clamping, bonding, etc. Since there are various related methods, they are not limited in this utility model.

[0044] Refer to the attached Figure 1 - attached Figure 6 , the radial vibration sensor 4 is horizontally arranged, and the axial vibration sensor 5 is vertically arranged.

[0045] Specifically, the horizontally arranged radial vibration sensor 4 is in the same deformation direction as the transmission frame 21 to better pick up the radial signal; similarly, the vertically arranged axial vibration sensor 5 is in the same swinging direction as the linkage plate 2 to better pick up the axial signal.

[0046] Refer to the attached Figure 1 - attached Figure 6 , a first limiting block 22 is provided on the linkage plate 2, and the radial vibration sensor 4 is connected to the first limiting block 22 and the transmission frame 21 through the first screw 41; a second limiting block 32 is provided on the machine base 3, and the axial vibration sensor 5 is connected to the second limiting block 32 and the linkage plate 2 through the second screw 51; the design of the first limiting block 22 and the second limiting block 32 can respectively provide a着力点 for the radial vibration sensor 4 and the axial vibration sensor 5, so that the two can be installed more stably.\

[0047] It should also be noted that although the embodiments of the present application have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present application.

Claims

1. A high-precision vibration signal measuring device, characterized in that, It includes a fixed plate (1), a linkage plate (2) and a machine base (3) arranged in sequence from top to bottom: the fixed plate (1) is used for installing a rotating workpiece (P); the linkage plate (2) is connected to the fixed plate (1) through a transmission frame (21), and a radial vibration sensor (4) connecting the transmission frame (21) is installed on the linkage plate (2); the machine base (3) is connected to the linkage plate (2) through an elastic support (31), and an axial vibration sensor (5) connecting the linkage plate (2) is installed on the machine base (3).

2. The high-precision vibration signal measuring device according to claim 1, characterized in that, Both the fixed plate (1) and the linkage plate (2) are located directly above the machine base (3), and the rotating workpiece (P) is coaxially installed with the elastic support (31).

3. The high-precision vibration signal measuring device according to claim 2, characterized in that, The elastic support (31) is a flexible hinge.

4. The high-precision vibration signal measuring device according to claim 1, characterized in that, The transmission frame (21) includes two support plates (210), and the two support plates (210) are symmetrically installed on two opposite sides of the linkage plate (2) and synchronously connected to the fixed plate (1).

5. The high-precision vibration signal measuring device according to claim 4, characterized in that, The fixed plate (1) is in the shape of a "囗".

6. The high-precision vibration signal measuring device according to claim 1, characterized in that, The rotating workpiece (P) is installed on the top surface of the fixed plate (1) through a fastening bolt (6).

7. A high-precision vibration signal measuring device according to claim 6, characterized in that, A counterbore (11) extending upward is formed at the bottom of the fixed plate (1), a threaded hole (P1) is provided at the bottom of the rotating workpiece (P), and one end of the fastening bolt (6) can pass through the counterbore (11) and connect to the threaded hole (P1).

8. The high-precision vibration signal measuring device according to claim 1, characterized in that, The radial vibration sensor (4) is horizontally arranged, and the axial vibration sensor (5) is vertically arranged.

9. A high-precision vibration signal measuring device according to claim 8, characterized in that, A first limiting block (22) is provided on the linkage plate (2), and the radial vibration sensor (4) is connected to the first limiting block (22) and the transmission frame (21) through a first screw (41); a second limiting block (32) is provided on the machine base (3), and the axial vibration sensor (5) is connected to the second limiting block (32) and the linkage plate (2) through a second screw (51).

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