Intelligent monitoring system for vibration state of rotating machinery

Abstract

The application discloses a kind of rotating machinery vibration state intelligent monitoring systems, axial monitoring unit is used to monitor the shaft axial vibration of rotating machinery, axial monitoring unit is installed in the shaft axial side;Multiple radial monitoring units monitor the shaft radial vibration of rotating machinery, multiple radial monitoring units are evenly distributed in the shaft radial periphery;Positioning unit is installed on the shell of rotating machinery, positioning unit is used to install each monitoring unit;Each monitoring unit includes linear ball grid measuring scale, the output end of each monitoring unit is connected to a early warning unit.By axial and radial vibration monitoring unit, the shaft axial vibration and radial vibration of rotating machinery are directly monitored in real time, early warning is prompted through early warning unit, to avoid mechanical failure, the shaft system vibration of the application is directly monitored to rotating machinery, detection result is accurate, and the vibration of axial and radial is monitored simultaneously, and monitoring result is more comprehensive.

Description

Technical Field

[0001] This invention relates to the field of condition monitoring technology for rotating machinery, and specifically to an intelligent monitoring system for the vibration condition of rotating machinery. Background Technology

[0002] Fault monitoring and diagnosis of rotating machinery generally includes fault diagnosis of pump sets and shaft systems. Pump set faults include: loose base, imbalance, stall, poor lubrication, and electrical faults; shaft system faults include: shaft wear. For rotating machinery, a sudden change is considered to have occurred when the vibration signal amplitude exceeds a threshold value. This threshold is a limit value set according to relevant national standards. For a given set of rotating machinery, these thresholds are constants and generally do not change over time after initial setting. Therefore, effective monitoring of the vibration state of rotating machinery can be achieved simply by monitoring the vibration amplitude.

[0003] In the existing technology, vibration detectors are usually used to detect the vibration of the casing of rotating machinery. This detection method is very inconvenient, and the detection results are not accurate. At present, there are very few direct detection methods for shaft vibration. Summary of the Invention

[0004] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0005] The purpose of this invention is to provide an intelligent monitoring system for the vibration status of rotating machinery. Through axial and radial vibration monitoring units, it directly monitors the axial and radial vibration of rotating machinery in real time and records the monitoring results. When the vibration amplitude of a certain shaft exceeds a threshold, an early warning unit issues a warning to prevent mechanical failure. This invention directly monitors the vibration of the rotating machinery's shaft system, providing accurate detection results, and simultaneously monitors both axial and radial vibrations, resulting in more comprehensive monitoring. Furthermore, this invention uses precision forming measuring equipment to automatically monitor the vibration of the rotating machinery's shaft system from all angles, enabling remote monitoring and early warning, reducing manual workload and achieving intelligent operation. This invention effectively solves the technical problem of the difficulty in directly monitoring the vibration of rotating machinery's shaft system.

[0006] To achieve these and other advantages according to the present invention, an intelligent monitoring system for the vibration state of rotating machinery is provided, comprising:

[0007] An axial monitoring unit is used to monitor the axial vibration of the shaft of rotating machinery. The axial monitoring unit is installed on one side of the shaft in the axial direction.

[0008] Multiple radial monitoring units are used to monitor the radial vibration of the rotating shaft of the rotating machinery. The multiple radial monitoring units are evenly distributed on the radial outer periphery of the rotating shaft.

[0009] A positioning unit, which is mounted on the housing of the rotating machinery, is used to mount various monitoring units;

[0010] Each monitoring unit includes a linear ball grid measuring ruler, and the output of each monitoring unit is connected to an early warning unit.

[0011] Preferably, the first end of the rotating shaft extends outward from the housing of the rotating machinery and is connected to the driving device, the second end of the rotating shaft extends outward from the housing of the rotating machinery, and a coupling is installed on the lead-out end of the second end of the rotating shaft. A linkage shaft extends from the center of the outer side wall of the coupling, and the diameter of the linkage shaft is smaller than the diameter of the rotating shaft.

[0012] Preferably, the positioning unit is a cylindrical shaft structure. A boss for connecting the housing is provided on the outer periphery of the first axial end of the positioning unit. A first through hole is opened through the center of the shaft of the positioning unit. A first internal thread and an annular groove are provided on the inner peripheral wall of the first through hole. An annular cavity is opened at the first axial end of the positioning unit. The annular cavity communicates with the first through hole. The diameter of the annular cavity is larger than the diameter of the coupling. The coupling is located in the annular cavity. The linkage shaft extends from the first axial end into the first through hole.

[0013] Preferably, the linkage shaft is coaxially arranged with the first through hole, and the axial first end of the positioning unit is provided with a plurality of mounting holes radially opened on the outer periphery. The plurality of mounting holes are evenly opened on the outer periphery of the positioning unit. The inner peripheral wall of the mounting hole is provided with a second internal thread. The bottom of the mounting hole communicates with the first through hole through a second through hole, and the mounting hole is located in the outer peripheral space of the linkage shaft.

[0014] Preferably, the axial monitoring unit is installed in the first through hole, and the axial monitoring unit includes:

[0015] A first metal sleeve has a first external thread on the outer periphery of its first axial end, and the first metal sleeve is installed on the first internal thread through the first external thread.

[0016] The first spring has its axial second end built into the first metal sleeve;

[0017] A first metal ball is tightly installed inside the first metal sleeve, and the diameter of the first metal ball is the same as the inner diameter of the first metal sleeve.

[0018] A first reading head is installed in the annular groove, and the output end of the first reading head is connected to the warning unit.

[0019] Preferably, the second axial end of the linkage shaft extends into the first metal sleeve and abuts against the first axial end of the first metal ball via a cylindrical slider. The first spring is in a compressed state, the slider slides tightly in the first through hole, the linkage shaft abuts against the center of the slider, and the diameter of the linkage shaft is smaller than the diameter of the first metal ball.

[0020] Preferably, a bearing is sleeved on the linkage shaft, the bearing is located in the first through hole, and a gap is reserved between the outer periphery of the bearing and the inner peripheral wall of the first through hole; a plurality of threaded holes are evenly opened radially on the outer periphery of the bearing, and a plurality of linkage rods are threadedly connected in the threaded holes, each linkage rod having the same size, and the linkage rods extend into the mounting hole after passing through the second through hole.

[0021] Preferably, the radial monitoring unit is installed in the mounting hole, and the radial monitoring unit includes:

[0022] The second metal sleeve has a second external thread on the outer periphery of its first axial end, and the second metal sleeve is installed on the second internal thread through the second external thread.

[0023] The second spring, which is built into the second metal sleeve at its axial second end;

[0024] The second metal ball is tightly installed inside the second metal sleeve, and the diameter of the second metal ball is the same as the inner diameter of the second metal sleeve.

[0025] The second reading head is sleeved on the outer periphery of the second metal sleeve, and the second reading head is located outside the mounting hole. The output end of the second reading head is connected to the warning unit.

[0026] Preferably, the second axial end of the linkage rod extends into the second metal sleeve and abuts against the first axial end of the second metal ball, the second spring is in a compressed state, and the linkage rod abuts against the center of the second metal ball, the diameter of the linkage rod being smaller than the diameter of the second metal ball.

[0027] Preferably, four radial monitoring units are provided, and each radial monitoring unit is evenly distributed on the outer side of the bearing.

[0028] Compared with the prior art, the beneficial effects of this invention are as follows:

[0029] 1. This invention directly monitors the shaft system of rotating machinery in real time, and provides remote feedback and early warning of the monitoring data, thereby realizing intelligent monitoring of the vibration of rotating machinery;

[0030] 2. Simultaneously monitor the axial and radial vibration of the rotating machinery shaft system. The monitoring results are more comprehensive, effectively preventing the occurrence of rotating machinery failures.

[0031] 3. By using a high-precision displacement measuring device to monitor the vibration of the shaft system of rotating machinery, the monitoring results are more accurate;

[0032] 4. By replacing manual detection of the vibration of the rotating machinery's outer shell with an intelligent monitoring system, the monitoring process becomes more convenient and the monitoring error is smaller.

[0033] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0034] Figure 1 This is a side view of the rotating machinery of the present invention;

[0035] Figure 2 This is the main view of the installation structure of the positioning unit;

[0036] Figure 3 This is a side view of the installation structure of the monitoring unit;

[0037] Figure 4 This is the main view of the installation structure of the monitoring unit;

[0038] Figure 5 This is a sectional view of the installation of this coupling;

[0039] Figure 6 This is a cross-sectional view of the positioning unit;

[0040] Figure 7 This is a sectional view of the positioning unit installation structure;

[0041] Figure 8 This is a cross-sectional view of the installation structure of the axial monitoring unit;

[0042] Figure 9 This is a cross-sectional view of the installation structure of the radial monitoring unit. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0044] like Figure 1-9As shown, the present invention provides an intelligent monitoring system for the vibration state of rotating machinery, including: an axial monitoring unit 400, multiple radial monitoring units 500 and a positioning unit 300. The axial monitoring unit 400 is used to monitor the axial vibration of the rotating shaft 200 of the rotating machinery in real time. In this embodiment, the rotating machinery is described using an electric motor as an example. A rotor coil 100 is provided on the outer periphery of the rotating shaft 200, and the rotor coil 100 rotates synchronously with the rotating shaft 200.

[0045] The first end 210 of the rotating shaft 200 extends outward from the first end of the housing of the rotating machinery and is connected to the driving device. The second end of the rotating shaft 200 extends outward from the second end of the housing of the rotating machinery. Specifically, a coupling 220 is installed on the lead-out end of the second end of the rotating shaft 200. A mating plate 260 is provided on the second end of the rotating shaft 200, which is connected to the coupling 220. A linkage shaft 230 extends from the center of the outer side wall of the coupling 220. The linkage shaft 230 moves synchronously with the rotating shaft 200. The diameter of the linkage shaft 230 is smaller than the diameter of the rotating shaft 200, and the linkage shaft 230 and the rotating shaft 200 are coaxially arranged.

[0046] The positioning unit 300 is installed on the housing of the rotating machinery to prevent it from moving in conjunction with the rotating shaft 200. The positioning unit 300 is used to install various monitoring units. Specifically, the positioning unit 300 is a cylindrical shaft structure. A boss 310 for connecting the housing is provided on the outer periphery of the first axial end of the positioning unit 300. The entire positioning unit 300 is installed on the outer wall of the housing by the boss 310 and bolts, and the positioning unit 300 is coaxial with the rotating shaft 200.

[0047] The positioning unit 300 has a first through hole 330 extending through its shaft center. The inner circumferential wall of the first through hole 330 is provided with a first internal thread 331 and an annular groove 350. The positioning unit 300 has an annular cavity 340 at its axial first end, which communicates with the first through hole 330. The diameter of the annular cavity 340 is larger than the diameter of the coupling 220. The coupling 220 is located within the annular cavity 340, and a gap is reserved between the coupling 220 and the annular cavity 340 to provide space for possible vibration of the rotating shaft 200, facilitating vibration monitoring. The linkage shaft 230 extends from its axial first end into the first through hole 330.

[0048] The linkage shaft 230 is coaxially spaced with the first through hole 330. The axial first end of the positioning unit 300 has a plurality of mounting holes 320 radially formed on its outer periphery. The plurality of mounting holes 320 are evenly formed on the outer periphery of the positioning unit 300. In this embodiment, four mounting holes 320 are evenly formed. The inner peripheral wall of the mounting hole 320 is provided with a second internal thread 321. The bottom of the mounting hole 320 is connected to the first through hole 330 through a second through hole. The diameter of the second through hole is smaller than the diameter of the mounting hole 320, and the mounting hole 320 is located in the outer peripheral space of the linkage shaft 230.

[0049] The axial monitoring unit 400 is installed in the first through hole 330 and is used to monitor the axial vibration of the rotating shaft 200 of the rotating machinery in real time. Specifically, the axial monitoring unit 400 includes: a first metal sleeve 410, a first spring 420, a first metal ball 430 and a first reading head 450. The first metal sleeve 410 is provided with a first external thread 440 on the outer periphery of the first axial end. The first metal sleeve 410 is installed on the first internal thread 331 through the first external thread 440, thereby realizing the positioning and installation of the axial monitoring unit 400 and the positioning unit 300.

[0050] The first spring 420 is built into the second axial end inside the first metal sleeve 410; the first metal ball 430 is tightly installed inside the first metal sleeve 410, and the diameter of the first metal ball 430 is the same as the inner diameter of the first metal sleeve 410. Lubricating oil is provided inside the first metal sleeve 410 to facilitate the tight rolling of the first metal ball 430 inside the first metal sleeve 410. The first metal ball 430 can only move axially in the first metal sleeve 410 to avoid other movement gaps that would affect the detection accuracy.

[0051] The first reading head 450 is installed in the annular groove 350, that is, it is sleeved on the outer circumference of the first metal sleeve 410. It is used to measure the axial displacement of the first metal ball 430. The output end of the first reading head 450 is connected to the early warning unit to transmit the axial displacement measurement result remotely in real time and compare the axial displacement with a threshold. When the threshold is exceeded, the early warning unit will issue an early warning.

[0052] The rotating shaft 200, the linkage shaft 230, the first metal sleeve 410, and the first metal ball 430 are coaxially arranged. The second axial end of the linkage shaft 230 extends into the first metal sleeve 410 and abuts against the first axial end of the first metal ball 430 through a cylindrical slider 460, so that the first spring 420 is in a compressed state. The slider 460 slides tightly in the first through hole 330, and the linkage shaft 230 abuts against the center of the slider 460. The diameter of the linkage shaft 230 is smaller than the diameter of the first metal ball 430.

[0053] When the rotating shaft 200 vibrates axially, the linkage shaft 230 moves synchronously with the rotating shaft 200, pushing the first metal ball 430 to move axially to the second end inside the first metal sleeve 410. Under the action of the first spring 420, the first metal ball 430 moves axially synchronously with the rotating shaft 200. The first reading head 450 can accurately measure the displacement of the first metal ball 430, thereby accurately monitoring the axial vibration of the rotating shaft 200.

[0054] A bearing 240 is sleeved on the linkage shaft 230. The bearing 240 is located inside the first axial end of the first through hole 330. The diameter of the bearing 240 is smaller than the inner diameter of the first through hole 330, so that a gap is reserved between the outer circumference of the shaft 240 and the inner circumferential wall of the first through hole 330, providing a certain space for possible radial vibration of the shaft 200 for measurement. Multiple threaded holes are evenly opened radially on the outer circumference of the bearing 240. Multiple linkage rods 250 are threadedly connected in the threaded holes. Each linkage rod 250 has the same size. The linkage rod 250 extends into the mounting hole 320 after passing through the second through hole.

[0055] Multiple radial monitoring units 500 monitor the radial vibration of the rotating shaft 200 of the rotating machinery. The multiple radial monitoring units 500 are evenly distributed on the radial outer periphery of the rotating shaft 200. In this embodiment, four radial monitoring units 500 are provided. In order to improve the monitoring accuracy of the radial vibration, there may be more than four radial monitoring units 500. Each of the radial monitoring units 500 is evenly distributed on the outer side of the bearing 240.

[0056] The structure of the radial monitoring unit 500 is the same as that of the axial monitoring unit 400, except that the installation position is axial or radial. Each radial monitoring unit 500 is installed in a corresponding mounting hole 320. Each radial monitoring unit 500 includes: a second metal sleeve 510, a second spring 520, a second metal ball 530, and a second reading head 550. The second metal sleeve 510 has a second external thread 540 on its outer circumference at its first axial end. The second metal sleeve 510 is mounted on the second internal thread 321 via the second external thread 540, thereby installing the radial monitoring unit 500 in the mounting hole 320. The second spring 520 is built into the second internal thread 321. The second metal ball 530 is tightly installed inside the second metal sleeve 510 at the axial second end. The diameter of the second metal ball 530 is the same as the inner diameter of the second metal sleeve 510. The second reading head 550 is sleeved on the outer circumference of the second metal sleeve 510 and is used to measure the displacement of the second metal ball 530, which is the radial vibration of the rotating shaft 200. The second reading head 550 is located outside the mounting hole 320. The output end of the second reading head 550 is connected to the early warning unit to transmit the radial displacement measurement result remotely in real time and compare the radial displacement with a threshold. When the threshold is exceeded, an early warning is issued by the early warning unit.

[0057] The second axial end of the linkage rod 250 extends into the second metal sleeve 510 and abuts against the first axial end of the second metal ball 530, causing the second spring 520 to be in a compressed state. The linkage rod 250 abuts against the center of the second metal ball 530, and the diameter of the linkage rod 250 is smaller than the diameter of the second metal ball 530. Four symmetrically arranged linkage rods 250 are installed on the outer periphery of the bearing 240 to position the bearing 240.

[0058] When the shaft 200 vibrates radially, the bearing 240 moves synchronously with the shaft 200 in the radial direction, pushing the second metal ball 530 to move axially to the second end inside the second metal sleeve 510. Under the action of the second spring 520, the second metal ball 530 moves axially synchronously with the shaft 200. The second reading head 550 can accurately measure the displacement of the second metal ball 530, thereby accurately monitoring the radial vibration of the shaft 200 and accurately measuring the vibration corresponding to the four sides of the outer periphery of the shaft 200, resulting in higher measurement accuracy.

[0059] Each monitoring unit of this invention includes a linear ball grid measuring ruler, which has a measurement accuracy down to the micrometer level, effectively improving the measurement accuracy of the rotating shaft 200. An early warning unit is connected to the output of each monitoring unit to analyze and issue early warnings based on the vibration detection results.

[0060] As described above, this invention directly monitors the shaft system of rotating machinery in real time, provides remote feedback and early warning of monitoring data, and realizes intelligent monitoring of the vibration of rotating machinery. Simultaneously, it monitors both axial and radial vibrations of the rotating machinery shaft system, resulting in more comprehensive monitoring results and effectively preventing malfunctions. Furthermore, by using a high-precision displacement measuring device to monitor the vibration of the rotating machinery shaft system, the monitoring results are more accurate. Moreover, by replacing manual detection of the vibration of the rotating machinery's outer shell with an intelligent monitoring system, the monitoring process is more convenient and the monitoring error is smaller.

[0061] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An intelligent monitoring system for the vibration state of rotating machinery, characterized in that, include: An axial monitoring unit is used to monitor the axial vibration of the shaft of rotating machinery. The axial monitoring unit is installed on one side of the shaft in the axial direction. Multiple radial monitoring units are used to monitor the radial vibration of the rotating shaft of the rotating machinery. The multiple radial monitoring units are evenly distributed on the radial outer periphery of the rotating shaft. A positioning unit, which is mounted on the housing of the rotating machinery, is used to mount various monitoring units; Each monitoring unit includes a linear ball grid measuring ruler, and the output of each monitoring unit is connected to an early warning unit. The first end of the rotating shaft extends outward from the housing of the rotating machinery and is connected to the driving device. The second end of the rotating shaft extends outward from the housing of the rotating machinery. A coupling is installed on the extension end of the second end of the rotating shaft. A linkage shaft extends from the center of the outer side wall of the coupling. The diameter of the linkage shaft is smaller than the diameter of the rotating shaft. The positioning unit is a cylindrical shaft structure. A boss for connecting to the housing is provided on the outer periphery of the first axial end of the positioning unit. A first through hole is opened through the center of the shaft of the positioning unit. A first internal thread and an annular groove are provided on the inner peripheral wall of the first through hole. The positioning unit has a first axial first... An annular cavity is formed at one end, which communicates with the first through hole. The diameter of the annular cavity is larger than the diameter of the coupling. The coupling is located in the annular cavity. The linkage shaft extends into the first through hole from the first axial end. The linkage shaft is coaxially arranged with the first through hole. Multiple mounting holes are radially formed on the outer periphery of the first axial end of the positioning unit. The multiple mounting holes are evenly formed on the outer periphery of the positioning unit. A second internal thread is provided on the inner peripheral wall of the mounting hole. The bottom of the mounting hole communicates with the first through hole through a second through hole. The mounting hole is located in the outer peripheral space of the linkage shaft. The axial monitoring unit is installed in the first through hole. The axial monitoring unit includes: a first metal sleeve with a first external thread on the outer periphery of its first axial end, the first metal sleeve being installed on the first internal thread through the first external thread; a first spring with its second axial end built inside the first metal sleeve; a first metal ball tightly installed inside the first metal sleeve, the diameter of the first metal ball being the same as the inner diameter of the first metal sleeve; and a first reading head installed in the annular groove, the output end of the first reading head being connected to the warning unit. The second axial end of the linkage shaft extends into the first metal sleeve and abuts against the first axial end of the first metal ball via a cylindrical slider. The first spring is in a compressed state, and the slider slides tightly in the first through hole. The linkage shaft abuts against the center of the slider, and the diameter of the linkage shaft is smaller than the diameter of the first metal ball. A bearing is sleeved on the linkage shaft and is located in the first through hole. A gap is reserved between the outer circumference of the bearing and the inner circumferential wall of the first through hole. Multiple threaded holes are evenly opened radially on the outer circumference of the bearing, and multiple linkage rods are threadedly connected in the threaded holes. Each linkage rod has the same size and extends into the mounting hole after passing through the second through hole. The radial monitoring unit is installed in the mounting hole. The radial monitoring unit includes: a second metal sleeve with a second external thread on the outer periphery of its axial first end, the second metal sleeve being installed on the second internal thread through the second external thread; a second spring with its axial second end built inside the second metal sleeve; a second metal ball tightly installed inside the second metal sleeve, the diameter of the second metal ball being the same as the inner diameter of the second metal sleeve; and a second reading head sleeved on the outer periphery of the second metal sleeve, the second reading head being located outside the mounting hole, the output end of the second reading head being connected to the warning unit.

2. The intelligent monitoring system for the vibration state of rotating machinery as described in claim 1, characterized in that, The second axial end of the linkage rod extends into the second metal sleeve and abuts against the first axial end of the second metal ball. The second spring is in a compressed state, and the linkage rod abuts against the center of the second metal ball. The diameter of the linkage rod is smaller than the diameter of the second metal ball.

3. The intelligent monitoring system for the vibration state of rotating machinery as described in claim 2, characterized in that, Four radial monitoring units are provided, and each radial monitoring unit is evenly distributed on the outer side of the bearing.

Images