A rotor vibration displacement measuring device

Abstract

The application discloses a rotor vibration displacement measuring device, and relates to the technical field of mechanical vibration, which aims at solving the problem that the installation directions of two displacement sensors at the same measuring point cannot be completely orthogonal in the prior art. The device comprises a ring-shaped support, a support framework and displacement sensors. The radius of the ring-shaped support is larger than that of the rotor. The circumference of the ring-shaped support is larger than one fourth of the circumference. The rotor penetrates the ring center of the ring-shaped support. A plurality of ring holes are arranged on the ring-shaped support. One set of displacement sensors is installed in one set of ring holes, so as to ensure that the installation directions of each set of displacement sensors are orthogonal to each other. The displacement sensors are used for measuring the radial vibration displacement data of the rotor. One end of the support framework is installed on the outer side of the ring-shaped support, and the other end is fixed on the equipment to be measured, so as to fix the installation direction of the ring-shaped support. The center of the ring-shaped support is located on the axis of the rotor. The application ensures that the installation directions of the two displacement sensors at the same measuring point are completely orthogonal.

Description

Technical Field

[0001] This invention relates to the field of mechanical vibration technology, and in particular to a rotor vibration displacement measuring device. Background Technology

[0002] Vibration displacement measurement of rotating machinery is one of the common problems in vibration engineering. The commonly used measurement method is to install eddy current sensors in the horizontal and vertical directions of the rotor to measure the vibration displacement of the rotor in the horizontal and vertical directions respectively.

[0003] When measuring the radial vibration displacement of a rotor, multiple displacement sensors need to be arranged at different positions along the rotor axis to obtain the spatial deformation and vibration of the rotor during operation, and to monitor and record the radial vibration displacement of the rotor in real time. Existing technologies generally require two orthogonal eddy current displacement sensors to be arranged at the same measurement point as the basis for determining the rotor's operating state, high-speed dynamic balancing, and fault diagnosis. However, in actual implementation, because the two displacement sensors at the same measurement point are installed independently, it cannot be guaranteed that their installation directions are completely orthogonal. Summary of the Invention

[0004] The purpose of this invention is to provide a rotor vibration displacement measuring device to solve the problem in the prior art that the installation directions of two displacement sensors at the same measuring point cannot be completely orthogonal when measuring the radial vibration displacement of a rotor.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A rotor vibration displacement measuring device includes: an annular bracket, a support frame, and a displacement sensor;

[0007] The radius of the annular support is larger than the radius of the rotor of the device under test; the circumference of the annular support is greater than a quarter of the circumference; the rotor passes through the center of the annular support; the annular support is provided with multiple sets of annular holes, each set containing multiple holes; a set of displacement sensors are installed in a set of annular holes to ensure that the installation directions of each set of displacement sensors are orthogonal to each other; the displacement sensors are used to measure the radial vibration displacement data of the rotor; one end of the support frame is installed on the outside of the annular support, and the other end is fixed to the device under test to fix the installation direction of the annular support; the center of the annular support is located on the axis of the rotor.

[0008] Compared with the prior art, the present invention provides a rotor vibration displacement measuring device, including an annular bracket, a support frame, and displacement sensors. The radius of the annular bracket is larger than the radius of the rotor of the device under test, ensuring that the annular bracket can surround the outside of the rotor. The circumference of the annular bracket is greater than a quarter circle circumference, ensuring that the installation angle of the two displacement sensors mounted on the annular bracket can reach at least 90°. The rotor passes through the center of the annular bracket. The annular bracket is provided with multiple sets of annular holes, each set containing multiple holes. One set of displacement sensors is installed in one set of annular holes to ensure that the installation directions of each set of displacement sensors are orthogonal to each other. The installation direction of the displacement sensors is determined by using annular holes. By installing two displacement sensors in two mutually orthogonal annular holes, the installation directions of the two displacement sensors are also ensured to be orthogonal. The displacement sensors are used to measure the radial vibration displacement data of the rotor. One end of the support frame is installed on the outside of the annular bracket, and the other end is fixed to the device under test. This serves to fix the installation direction of the annular bracket, allowing it to support the device under test for measurement experiments. The center of the annular bracket is located on the axis of the rotor, ensuring that the installation direction of each pair of orthogonal displacement sensors is consistent with the radial direction of the rotor, preventing radial deviation and ensuring measurement accuracy. This invention ensures that the installation directions of the displacement sensors at the same measurement point are completely orthogonal by setting multiple sets of annular holes on the annular bracket and installing two displacement sensors in two mutually orthogonal annular holes. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0010] Figure 1 A side view of a rotor vibration displacement measuring device provided in an embodiment of the present invention;

[0011] Figure 2 This is a schematic diagram of the ring-shaped support structure in an embodiment of the present invention;

[0012] Figure 3 This is a schematic diagram of the support plate in an embodiment of the present invention;

[0013] Figure 4 This is a partial enlarged view of the support plate in an embodiment of the present invention;

[0014] Figure 5 This is a dimensional diagram of the support plate in an embodiment of the present invention;

[0015] Figure 6 This is a schematic diagram of the supporting skeleton in an embodiment of the present invention;

[0016] Figure 7 This is a schematic diagram of the installation of a rotor vibration displacement measuring device provided in an embodiment of the present invention;

[0017] Figure 8 This is a schematic diagram of the supporting base in an embodiment of the present invention;

[0018] Figure 9 This is a graph showing measurement data from a set of mutually orthogonal displacement sensors provided in an embodiment of the present invention.

[0019] Reference numerals: 1-ring bracket, 2-support frame, 21-support base, 211-fixed base, 212-support base, 213-column, 22-axial fixed beam, 23-transverse fixed beam, 3-displacement sensor, 4-rotor, 5-support plate, 6-base, 7-drive system, 8-coupling, 9-rotor support component. Detailed Implementation

[0020] To facilitate a clear description of the technical solutions in the embodiments of the present invention, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. For example, the first threshold and the second threshold are merely used to distinguish different thresholds and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" are not necessarily different.

[0021] It should be noted that in this invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0022] In this invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0023] The technical solution of this application will now be described in conjunction with the accompanying drawings:

[0024] like Figure 1 As shown, the present invention provides a rotor vibration displacement measuring device, comprising: an annular bracket 1, a support frame 2, and a displacement sensor 3;

[0025] The radius of the annular support 1 is larger than the radius of the rotor 4 of the device under test; the circumference of the annular support 1 is greater than a quarter circle circumference; the rotor 4 passes through the center of the annular support 1; the annular support 1 is provided with multiple sets of annular holes, and each set of annular holes contains multiple holes; a set of displacement sensors 3 are installed in a set of annular holes to ensure that the installation directions of each set of displacement sensors 3 are orthogonal to each other; the displacement sensors 3 are used to measure the radial vibration displacement data of the rotor 4; one end of the support frame 2 is installed on the outside of the annular support 1, and the other end is fixed to the device under test to fix the installation direction of the annular support 1; the center of the annular support 1 is located on the axis of the rotor 4.

[0026] Specifically, a ring-shaped support 1 is designed. The radius of the ring-shaped support 1 is larger than the radius of the rotor 4 of the device under test, ensuring that the ring-shaped support 1 can surround the outside of the rotor 4. The circumference of the ring-shaped support 1 is greater than one-quarter of the circumference of a circle, and the center of the ring-shaped support 1 is located on the axis of the rotor 4, ensuring that the installation angle of the two displacement sensors 3 mounted on the ring-shaped support 1 is at least 90°. When the circumference of the ring-shaped support 1 is equal to the circumference of a circle, at least one end of the rotor 4 of the device under test must be an open structure, allowing the ring-shaped support 1 to be inserted into the rotor 4 from the open end, enabling the ring-shaped support 1 to be placed around the outside of the rotor 4. The displacement sensors 3 mounted on the ring-shaped support 1 then measure the rotor 4. The ring-shaped support 1 can be made of an alloy, such as aluminum alloy or titanium alloy, which has higher strength and better corrosion resistance than other metal materials, and is less prone to deformation under long-term use, thus extending the service life of the ring-shaped support 1.

[0027] Displacement sensor 3 adopts a non-contact displacement sensor, such as an eddy current displacement sensor, a laser displacement sensor, or an ultrasonic displacement sensor. Compared with direct contact displacement sensors, non-contact displacement sensors do not need to contact the object being measured during operation, thus avoiding friction interference or vibration errors and enabling high-precision and high-speed measurements.

[0028] The annular bracket 1 can be a ring frame structure with a certain thickness, which can meet the requirement of opening annular holes inside it. Multiple sets of annular holes are opened on the annular bracket 1 along orthogonal directions. The displacement sensor 3 passes through the radial holes and is fixedly installed in the radial holes. The number of annular holes in a set is two, and the opening directions of the two annular holes in each set are mutually orthogonal. Two displacement sensors 3 are taken as a set of displacement sensors 3, and the set of displacement sensors 3 are installed in the mutually orthogonal set of annular holes. For example, with the horizontal direction as 0°, the opening angle of a set of annular holes can be 0° and 90°, 5° and 95°, 45° and 135°, etc., to ensure that the installation positions of the two displacement sensors 3 are mutually orthogonal and avoid the angular error caused by independently installing the displacement sensors 3. Meanwhile, for different measurement points along the same rotor 4 axis, multiple measurement points are on a straight line, and the multiple sets of annular holes used at each measurement point correspond to each other. That is, if a set of annular holes used at a certain measurement point is 0° and 90° annular holes, other measurement points on the same rotor 4 must also use 0° and 90° annular holes, and cannot use 45° and 135° annular holes. By ensuring the consistency of the radial hole orientation on the annular bracket 1 at different measurement points of the rotor 4, the consistency of the installation angle of the displacement sensor 3 at different measurement points is ensured, which facilitates the observation of rotor deformation and enables accurate measurement and analysis of rotor spatial deformation.

[0029] One end of the support frame 2 is installed on the outside of the annular bracket 1, and the other end is fixed on the device under test. This is used to fix the installation direction of the annular bracket 1, so that the radial direction of the annular bracket 1 is parallel to the radial direction of the rotor 4, and further ensure that the center of the annular bracket 1 is located on the axis of the rotor 4, making the measurement results more accurate.

[0030] As an optional implementation method, such as Figure 2 As shown, the displacement sensor 3 is installed through the annular hole; the side of the displacement sensor 3 that contacts the annular hole is provided with an external thread for installing a nut; the nut is used to adjust the extension amount of the displacement sensor 3 in the annular hole and to fix the displacement sensor 3 in the annular hole.

[0031] Specifically, the displacement sensor 3 is installed in the annular hole of the annular bracket 1, and is adjusted and fixed using an external thread on the surface of the displacement sensor 3 and a nut. The extension amount of the displacement sensor 3 in the annular hole is adjusted according to the requirements to meet the installation requirements, which is more flexible than a non-adjustable fixing method. The extension amount is calculated as follows: the inner diameter of the annular bracket 1 minus the outer diameter of the measured surface of the rotor 4, and then minus the value of the zero-position gap. The zero-position gap is set according to the rotor material, generally 1mm-5mm. The larger the rotor vibration amplitude, the larger the zero-position gap is set to ensure that the displacement sensor 3 will not collide or rub against the rotor 4 during operation. Based on the set zero-position gap, the outer diameter of the measured surface of the rotor 4, and the inner diameter of the annular bracket 1, the extension amount of the displacement sensor 3 is adjusted to make the measurement more accurate.

[0032] Furthermore, the opening direction of the annular hole is radial, pointing towards the center of the ring. This ensures that after the displacement sensor 3 is installed inside the annular hole, its orientation is also radial. The presence of two annular holes at 90° to each other radially ensures that the installation positions of the two displacement sensors 3 installed within these holes are orthogonal. The annular holes have internal threads, which, in conjunction with the external threads of the displacement sensor 3, securely mount the displacement sensor 3 within the annular hole, improving the reliability of the rotor vibration displacement measurement device.

[0033] Meanwhile, displacement sensor 3 can be an eddy current displacement sensor. The eddy current displacement sensor itself has external threads, so there is no need to specially open external threads on the side of the displacement sensor that contacts the annular hole. When the installation position of the eddy current displacement sensor meets the zero clearance, it is fixed in the annular hole by tightening the nut, thereby obtaining the static and dynamic relative displacement changes between the measured metal conductor and the probe end face of the eddy current displacement sensor. In the state analysis, vibration research or analysis and measurement of high-speed rotating machinery and reciprocating motion machinery, the eddy current displacement sensor can continuously and accurately collect a variety of parameters of the rotor vibration state, such as the radial vibration, amplitude and axial position of the shaft. It has the advantages of good long-term working reliability, wide measurement range, high sensitivity and high resolution, making the measurement results of displacement data more accurate.

[0034] As an optional implementation method, such as Figure 3 As shown, the rotor vibration displacement measuring device further includes a support plate 5; the support plate 5 is connected to the annular bracket 1 and the support frame 2 respectively, and is used to fix the annular bracket 1 on the support frame 2; a support plate positioning plate is provided at one end of the support plate 5 near the support frame 2, and is used to secure the support plate on the support frame; a support plate positioning groove is provided on one side of the support plate 5 near the annular bracket 1, and the annular bracket 1 is embedded in the support plate positioning groove, and is used to secure the annular bracket 1 on the support plate 5.

[0035] Specifically, the upper structure of the support plate 5 is consistent with the structure of the annular bracket 1, allowing the support plate 5 to connect to and support the annular bracket 1, thus making the annular bracket 1 more stable. Simultaneously, the support plate 5 has two limiting structures: firstly, a support plate positioning plate is provided at the end of the support plate 5 near the supporting frame 2, such as... Figure 1 As shown, the support plate positioning plate can be fixed to the support frame 2; secondly, the support plate 5 is provided with a support plate positioning groove on the side near the annular bracket 1, such as... Figure 4 As shown, the positioning groove of the support plate and the annular bracket 1 fit together, and the two limiting structures together ensure the installation position of the annular bracket 1, making it less prone to shaking or displacement. Bolt holes are provided on the support plate 5, such as... Figure 1 As shown, the ring bracket 1 and the support frame 2 are connected by bolts.

[0036] At the same time, such as Figure 5 As shown, the support plate 5 can have various sizes to support the annular bracket 1 of various sizes. When measuring rotors 4 with different outer diameters, there is no need to replace the support frame 2. Only the sizes of the support plate 5 and the annular bracket 1 need to be adjusted to meet the vibration displacement measurement requirements of rotors 4 with different outer diameters, making the invention highly versatile.

[0037] As an optional implementation method, such as Figure 6 and Figure 7 As shown, the support frame 2 includes a support base 21, an axial fixing beam 22, and a transverse fixing beam 23;

[0038] The support base 21 is mounted on the base 6 of the device under test; the axial fixing beam 22 is mounted on the support base 21, and the transverse fixing beam 23 is mounted on the axial fixing beam 22 to connect the axial fixing beam 22 and the support plate 5; the axial fixing beam 22 is a horizontal rectangular structure, and the direction of the long side of the axial fixing beam 22 is consistent with the direction of the axis of the rotor 4; the transverse fixing beam 23 is a horizontal rectangular structure, and the direction of the long side of the transverse fixing beam 23 is perpendicular to the direction of the axis of the rotor 4.

[0039] Specifically, such as Figure 6As shown, the axial fixing beam 22 is mounted on the support base 21, and the transverse fixing beam 23 is mounted on the axial fixing beam 22. The transverse fixing beam 23 connects the axial fixing beam 22 and the support plate 5, thereby completing the connection between the support frame 2 and the support plate 5. The support frame 2 is then connected to the annular bracket 1 through the support plate 5, completing the stable installation of the annular bracket 1. Furthermore, both the axial fixing beam 22 and the transverse fixing beam 23 are designed as rectangular structures, which facilitates the alignment of the long side of the axial fixing beam 22 with the axis of the rotor 4 and the long side of the transverse fixing beam 23 with the radius of the rotor 4. This ensures that the center of the annular bracket 1 is located on the axis of the rotor 4, making installation convenient and positioning accurate.

[0040] At the same time, such as Figure 7 As shown, when the device under test (DUT) is located on the ground, a base 6 with the rotor 4 of the DUT parallel to the axis of the rotor 4 is used to fix the support base 21. If the DUT is not located on the ground or does not have a base 6, a separate base 6 parallel to the axis of the rotor 4 of the DUT can be constructed for fixation. The base 6 has a simple structure and a groove for securing the support base 21, so that the support base 21 is stably installed on the base 6. The installation direction of the support base 21 is also parallel to the axis of the rotor 4 of the DUT.

[0041] And, as Figure 7 As shown, rotor 4 is supported by rotor support component 9, and coupling 8 is connected to drive system 7 and rotor 4 respectively, so that drive system 7 drives rotor 4 to run through coupling 8, and then the vibration displacement measurement during rotor operation is completed by displacement sensor 3 installed on the upper part of the present invention. Figure 9 As shown, in a high-speed dynamic balancing test of a liquid rocket engine turbopump rotor, a set of mutually orthogonal displacement sensors 3 are used to obtain the vibration displacement curves of the rotor 4 in two orthogonal directions when it moves at high speed. This allows for accurate phase identification results, rotor shaft trajectory and spatial deformation, which can reflect the true operating state of the rotor.

[0042] The coupling 8 is installed between the driving and driven sides of the power transmission, serving to transmit rotational torque, compensate for shaft installation misalignment, absorb equipment vibration, and buffer load impact. The coupling 8 can be a flexible coupling, accommodating higher rotor speeds. Furthermore, compared to a rigid coupling, a flexible coupling 8 provides better vibration damping, preventing vibrations from the drive system 7 itself from being transmitted to the rotor 4, thus avoiding vibration errors. Moreover, when a flexible coupling 8 is used, greater flexibility results in stronger absorption of deviations, while less flexibility indicates weaker absorption. Therefore, a flexible coupling 8, compared to a rigid coupling, has a stronger ability to absorb deviations (e.g., axial deviation, radial deviation, angular deviation, or combined deviation), making the measurement results of this invention more accurate.

[0043] Meanwhile, the displacement sensor 3 of the present invention can not only be installed on the rotor 4 to measure the vibration displacement data of the rotor 4, but also on the coupling 8 to measure the vibration displacement data of the coupling 8, so as to detect the motion state of the coupling 8 in real time and even detect the failure of the coupling 8, thereby improving the safety of the present invention.

[0044] As an optional implementation method, such as Figure 8 As shown, the support base 21 includes a base and a column 213; two bases are respectively connected to the two ends of one column 213; the base closer to the base is a fixed base 211, and the other base is a support base 212; the fixed base 211 is provided with bolt holes and a fixed base positioning plate; the fixed base positioning plate is embedded in the base 6 to secure the support base 21; the fixed base 211 is fixed to the base 6 by bolts.

[0045] Specifically, the support base 21 consists of a fixed base 211, a column 213, and a support base 212. The column 213 is positioned and installed with the fixed base 211 and the support base 212 respectively. A fixed base positioning plate is designed below the fixed base 211, which constitutes the limiting structure of the present invention. The fixed base positioning plate is embedded in the base 6 and positioned with the base 6. The fixed base positioning plate can be installed at any position on the fixed base 211, ensuring that it can fit into the base 6. This invention utilizes a fixed base to ensure that the support base 21 is precisely installed in the base 6 without axial or radial offset, thus improving the accuracy of radial vibration displacement measurement.

[0046] Meanwhile, the fixed base 211 is detachably and tightly fixed to the base 6 by bolts, so that the present invention can move the position of the support base 21 at will and measure the radial vibration displacement data of the rotor 4 at any axial position, ensuring accuracy while also having greater flexibility.

[0047] As an optional implementation method, such as Figure 8 As shown, the support base 212 is provided with bolt holes and a support base positioning plate, and the axial fixing beam 22 is provided with an axial beam positioning groove; the support base positioning plate is embedded in the axial beam positioning groove to secure the axial fixing beam 22; the axial fixing beam 22 is fixed to the support base 212 by bolts.

[0048] Specifically, a docking structure, such as a support base positioning plate, is provided at the edge of the upper surface of the support base 212 to cooperate with the axial fixing beam 22. This constitutes the limiting structure of the present invention, so that the support base positioning plate and the axial beam positioning groove of the axial fixing beam 22 are fitted together. Since the support base 21 is fitted inside the base 6 and the installation direction of the support base 21 is consistent with the axis of the rotor 4, the installation direction of the axial fixing beam 22, which is fixed on the support base 212, is consistent with the installation direction of the support base 21. This ensures that the installation direction of the axial fixing beam 22 is consistent with the axis of the rotor 4, thereby making the radial vibration displacement measurement more accurate.

[0049] As an optional implementation method, such as Figure 6 As shown, a plurality of transverse fixed beams 23 are installed on one of the axial fixed beams 22 for measuring the radial vibration displacement data of the rotor 4 at different axial positions.

[0050] Specifically, to measure vibration displacement data at different axial positions, measuring devices need to be installed at different axial positions. This invention further proposes that multiple transverse fixed beams 23 can be installed on a single axial fixed beam 22. Therefore, when measuring vibration displacement data at different axial positions, there is no need to move or replace the entire ring bracket 1, support frame 2, etc. Only the transverse fixed beams 23 need to be installed on the axial fixed beam 22 at the desired measurement point. Then, the support plate 5, ring bracket 1, and displacement sensor 3 are installed on the transverse fixed beams 23 to measure the vibration displacement data. This makes the invention easy to install and highly efficient. For example... Figure 9 As shown, the axial fixing beam 22 has various lengths, and the axial fixing beam 22 is designed with multiple mating grooves or protrusions distributed along the length direction, which improves the flexibility and versatility of the measurement of the present invention.

[0051] As an optional implementation method, such as Figure 1 As shown, the end of the transverse fixed beam 23 near the axial fixed beam 22 is provided with a first transverse beam positioning groove. The first transverse beam positioning groove is engaged with the short side of the axial fixed beam 22 to secure the transverse fixed beam 23 to the axial fixed beam 22.

[0052] Specifically, a first transverse beam positioning groove is formed at the end of the transverse fixed beam 23 near the axial fixed beam 22, which constitutes the limiting structure of the present invention. The first transverse beam positioning groove is engaged with the short side of the axial fixed beam 22, and the transverse fixed beam 23 is fixed on the axial fixed beam 22. This further ensures that the center of the annular bracket 1 is located on the axis of the rotor 4, making the measurement results more accurate.

[0053] As an optional implementation method, such as Figure 6 As shown, the end of the transverse fixed beam 23 near the support plate 5 is provided with a second transverse beam positioning groove. The second transverse beam positioning groove is engaged with the support plate positioning plate to secure the support plate 5 to the transverse fixed beam 23.

[0054] Specifically, a second transverse beam positioning groove is provided at the end of the transverse fixed beam 23 near the support plate 5, which constitutes the limiting structure of the present invention. The second transverse beam positioning groove and the support plate positioning plate are interlocked, and the support plate 5 is fixed on the transverse fixed beam 23. This further ensures that the center of the annular bracket 1 is located on the axis of the rotor 4, making the measurement results more accurate.

[0055] As an optional implementation method, such as Figure 8 As shown, the bolt holes provided on the fixed base 211 are semi-circular holes.

[0056] Specifically, the bolt holes on the fixed base 211 are designed as semi-circular holes, with semi-circular ends and a parallel plane in the middle. Therefore, semi-circular holes are easier to disassemble than ordinary round holes, and easier to adjust when the position of the fixed base 211 needs to be adjusted. This makes the invention easy to install, flexible to move, and highly efficient. Anchor bolts can be used to secure the device through the semi-circular holes, ensuring the support frame 21 remains stable under external forces, improving the stability of the rotor vibration displacement measuring device, and thus making the measurement data more accurate.

[0057] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, the disclosure, and the appended claims in carrying out the claimed invention. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0058] Although the invention has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made therein without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely exemplary descriptions of the invention as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if such modifications and modifications of the invention fall within the scope of the claims and their equivalents, the invention is also intended to include such modifications and modifications.

Claims

1. A rotor vibration displacement measuring device, characterized in that, include: Ring-shaped bracket, supporting frame, and displacement sensor; The radius of the annular support is larger than the radius of the rotor of the device under test; the arc length of the annular support is greater than one-quarter of the circumference. The rotor passes through the center of the annular support; the annular support is provided with multiple sets of annular holes, and each set of annular holes contains multiple holes; a set of displacement sensors are installed in a set of annular holes to ensure that the installation directions of the displacement sensors in the same set are orthogonal to each other; the displacement sensors are used to measure the radial vibration displacement data of the rotor. One end of the support frame is installed on the outside of the annular bracket, and the other end is fixed to the device under test, which is used to fix the installation direction of the annular bracket; the center of the annular bracket is located on the axis of the rotor.

2. The rotor vibration displacement measuring device according to claim 1, characterized in that, The displacement sensor is installed through the annular hole; the side of the displacement sensor that contacts the annular hole is provided with an external thread for installing a nut; the nut is used to adjust the extension amount of the displacement sensor in the annular hole and to fix the displacement sensor in the annular hole.

3. The rotor vibration displacement measuring device according to claim 1, characterized in that, The rotor vibration displacement measuring device further includes a support plate; the support plate is connected to the annular bracket and the support frame respectively, and is used to fix the annular bracket on the support frame; a support plate positioning plate is provided at one end of the support plate near the support frame, and is used to secure the support plate on the support frame; a support plate positioning groove is provided on one side of the support plate near the annular bracket, and the annular bracket is embedded in the support plate positioning groove, and is used to secure the annular bracket on the support plate.

4. The rotor vibration displacement measuring device according to claim 3, characterized in that, The support frame includes a support base, an axial fixing beam, and a transverse fixing beam; The support base is installed on the base of the device under test; the axial fixing beam is installed on the support base; the transverse fixing beam is installed on the axial fixing beam and is used to connect the axial fixing beam and the support plate; the axial fixing beam is a horizontal rectangular structure, and the direction of the long side of the axial fixing beam is consistent with the direction of the rotor's axis; the transverse fixing beam is a horizontal rectangular structure, and the direction of the long side of the transverse fixing beam is perpendicular to the direction of the rotor's axis.

5. The rotor vibration displacement measuring device according to claim 4, characterized in that, The support base includes a base and a column; two bases are respectively connected to the two ends of the same column; the base closer to the base is a fixed base, and the other base is a supporting base; the fixed base is provided with bolt holes and a fixed base positioning plate; the fixed base positioning plate is embedded in the base to secure the supporting base; the fixed base is fixed to the base by bolts.

6. The rotor vibration displacement measuring device according to claim 5, characterized in that, The support base is provided with bolt holes and a support base positioning plate, and the axial fixing beam is provided with an axial beam positioning groove; the support base positioning plate is embedded in the axial beam positioning groove to secure the axial fixing beam; the axial fixing beam is fixed to the support base by bolts.

7. A rotor vibration displacement measuring device according to claim 4, wherein Multiple transverse fixed beams are mounted on one of the axial fixed beams for measuring the radial vibration displacement data of the rotor at different axial positions.

8. A rotor vibration displacement measuring device according to claim 4, wherein The transverse fixed beam is provided with a first transverse beam positioning groove at the end near the axial fixed beam. The first transverse beam positioning groove is engaged with the short side of the axial fixed beam to secure the transverse fixed beam to the axial fixed beam.

9. A rotor vibration displacement measuring device according to claim 4, characterized in that, The end of the transverse fixed beam near the support plate is provided with a second transverse beam positioning groove, which is engaged with the support plate positioning plate to secure the support plate to the transverse fixed beam.

10. A rotor vibration displacement measuring device according to claim 5, characterized in that, The bolt holes on the fixed base are semi-circular holes.

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