Axial vibration monitoring device and method for high-speed rotating mechanism

Abstract

A device and method for monitoring axial vibration of a high-speed rotating mechanism includes a rotor, two stators mounted on the rotor, and a thrust plate mounted on the rotor and positioned between the two stators. The device and method are characterized by a detection surface provided on the thrust plate, and an axial vibration sensing assembly removably mounted between the two stators, radially aligned with the detection surface and configured to monitor axial displacement of the detection surface. The present invention enables real-time monitoring of the rotor's axial vibration, simplifies the mounting structure of the vibration sensing assembly, and improves monitoring reliability and effectiveness. The device replaces the conventional axial sensor mounting method with radial sensor mounting, achieving the purpose of measuring axial vibration while radially mounting the sensor. This saves axial space and facilitates improved shaft system dynamics in high-speed rotating mechanisms.

Description

Technical Field

[0001] The invention relates to a device and method for monitoring the axial vibration of a high-speed rotating mechanism, which are used for monitoring the axial vibration of the high-speed rotating mechanism. Background Art

[0002] In addition to the stator and rotor, high-speed rotating machinery also includes displacement sensors to detect rotor vibration signals. Typically, rotor vibration signals consist of radial and axial vibrations, and detecting each vibration signal requires one or more displacement sensors. A radial sensor is installed in a radial position using a sensor mount to detect radial position changes in the rotor, while a displacement sensor is installed in an axial position using a sensor mount to detect axial position changes in the rotor. Correct and appropriate installation of displacement sensors plays a vital role in monitoring the rotor position in high-speed rotating machinery.

[0003] Relevant existing solutions retrieved:

[0004] 1. (Application No. US10632739B2) In the solution, axial displacement is detected by an axially mounted displacement sensor. The sensor requires a fixed sensor mounting base, which increases the number of parts. The sensor installation occupies axial space, increasing the overall axial size of the structure.

[0005] 2. (Application No. CN209372027U) This solution opens a hole in the axial stator's magnetic pole, requiring the pole width to be not too small, otherwise the sensor cannot be installed. In addition, the sensor probe is completely within the magnetic field range of the electromagnetic coil, and the magnetic field generated by the electromagnetic coil and the magnetic field generated by the sensor probe will interfere with each other. In addition, the sensor probe is installed in the stator, adjacent to the electromagnetic coil, and the heating of the electromagnetic coil will also affect the performance of the probe.

[0006] 3. (Li Hongwei et al. Method for detecting axial displacement of magnetically suspended rotor using eddy current sensor [J]. Chinese Journal of Scientific Instrumentation. 2011, 32(7): 1441-1448.) The proposed method of radially installing the sensor to detect axial displacement changes provides a feasible principle. However, like Patent 1, the sensor still requires a sensor mounting base, which increases the number of parts. In addition, the sensor is radially installed at one end of the shaft, and a stepped structure is required, which still increases the axial length and installation space.

[0007] Therefore, optimizing the sensor installation structure and improving the rotor dynamics characteristics are one of the technical problems that need to be solved urgently in the design of high-speed rotating machinery. Summary of the Invention

[0008] The high-speed rotating mechanism axial vibration monitoring device and method provided by the present invention realize real-time monitoring of the axial vibration of the rotor. The installation structure of the vibration sensing component is simpler, and the monitoring reliability and effectiveness are higher. The common axial installation method of the sensor is changed to radial installation of the sensor, thereby achieving the purpose of radial installation of the sensor to measure the axial vibration, saving axial space, and being beneficial to the improvement of the shaft system dynamics of the high-speed rotating mechanism.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] An axial vibration monitoring device for a high-speed rotating mechanism includes a rotor, two stators mounted on the rotor, and a thrust plate mounted on the rotor and located between the two stators. The device is characterized in that a detection surface is provided on the thrust plate, and an axial vibration sensing component is detachably installed between the two stators, which is radially aligned with the detection surface and is used to monitor the axial displacement of the detection surface.

[0011] Preferably, the axial vibration sensing assembly includes a detachable spacer ring mounted between the two stators and a sensor mounted on the spacer ring, and the sensor is radially aligned with the detection surface.

[0012] Preferably, the spacer ring is coaxially arranged on the outer periphery of the thrust disk and radially separated from the thrust disk. The spacer ring is clamped between the two stators to axially separate the stator and the thrust disk.

[0013] Preferably, at least two sensors are mounted on the spacer ring, and the sensors are evenly spaced and distributed along the circumference of the spacer ring.

[0014] Preferably, the sensor is installed radially along the spacer ring, and the sensor extends into the gap between the thrust plate and the spacer ring.

[0015] Preferably, the thrust plate is T-shaped and is integrally formed by a large diameter section and a small diameter section having an outer diameter smaller than the large diameter section, and the radial annular surface formed between the large diameter section and the small diameter section is the detection surface.

[0016] Preferably, the detection surface is aligned with the central axis of the sensor.

[0017] Preferably, a radially arranged mounting hole is provided on the spacer ring, and the sensor is positioned in the mounting hole and extends into the gap between the thrust plate and the spacer ring.

[0018] A method for monitoring axial vibration of a high-speed rotating mechanism is characterized in that: the axial vibration is monitored by using the axial vibration monitoring device of a high-speed rotating mechanism as described in any one of claims 1 to 4, and the axial displacement of the detection surface is monitored in real time by an axial vibration sensing component, thereby monitoring the real-time axial vibration displacement of the rotor, so as to realize real-time monitoring of the axial vibration of the high-speed rotating mechanism.

[0019] Preferably, the axial gap between the thrust plate and the stator is adjusted by adjusting the axial thickness of the spacer ring, thereby adjusting the axial amplitude of the rotor so that the axial movement of the detection surface is within the detection range of the sensor.

[0020] The beneficial effects of the present invention are:

[0021] 1. In the axial vibration monitoring device for a high-speed rotating mechanism of the present invention, a detection surface is designed on the thrust plate, an axial vibration sensing component is installed between the two stators, and the detection surface is radially aligned with the axial vibration sensing component. By utilizing the structure in which the thrust plate and the rotor vibrate synchronously, the detection surface is used as the monitoring position of the vibration sensing component, and the axial real-time displacement of the detection surface is monitored to achieve real-time monitoring of the axial vibration of the rotor. The installation structure of the vibration sensing component is simpler, and the monitoring reliability and effectiveness are higher.

[0022] 2. The sensor in the vibration sensing assembly is installed on the spacer ring, and the original sensor mounting seat is omitted. The radial annular surface of the outer periphery of the thrust plate is used as the detection surface, and the original sensor detection ring is omitted, which simplifies the structure of the entire monitoring device. The sensor is installed radially along the spacer ring, and the sensor extends into the gap between the thrust plate and the spacer ring. The common axial installation method of the sensor is changed to radial installation of the sensor, so as to achieve the purpose of radial installation of the sensor and measure the axial vibration, save axial space, and is beneficial to the improvement of the shaft system dynamics of the high-speed rotating mechanism.

[0023] 3. The spacer ring serves as both a mounting part for the sensor and an adjustment part for the axial spacing between the stator and the thrust plate. Installing spacers of different axial widths can adjust the axial spacing between the thrust plate and the stator to limit the axial amplitude of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the axial vibration monitoring device of a high-speed rotating mechanism of the present invention. DETAILED DESCRIPTION

[0025] The following combination Figure 1 The embodiments of the present invention are described in detail.

[0026] An axial vibration monitoring device for a high-speed rotating mechanism includes a rotor 1, two stators 2 mounted on the rotor 1, and a thrust plate 3 mounted on the rotor 1 and located between the two stators 2. The device is characterized in that a detection surface 31 is provided on the thrust plate 3, and an axial vibration sensing component 4 is detachably installed between the two stators 2, which is radially aligned with the detection surface 31 and is used to monitor the axial displacement of the detection surface 31.

[0027] In the axial vibration monitoring device for a high-speed rotating mechanism described above, a detection surface 31 is designed on the thrust plate 3, an axial vibration sensing component 4 is installed between the two stators 2, and the detection surface 31 is radially aligned with the axial vibration sensing component 4. By utilizing the structure in which the thrust plate 3 and the rotor 1 vibrate synchronously, the detection surface 31 is used as the monitoring position of the vibration sensing component 4, and the real-time axial displacement of the detection surface is monitored to realize real-time monitoring of the axial vibration of the rotor. The installation structure of the vibration sensing component 4 is simpler, and the monitoring reliability and effectiveness are higher.

[0028] The axial vibration sensing assembly 4 includes a detachable spacer ring 41 mounted between the two stators 2 and a sensor 42 mounted on the spacer ring 41. The sensor 42 is radially aligned with the detection surface 31. The sensor 42 is mounted on the spacer ring 41, which is simple to install and does not occupy axial space.

[0029] The spacer ring 41 is coaxially arranged on the outer periphery of the thrust plate 3 and radially spaced from the thrust plate 3. The spacer ring 41 is sandwiched between the two stators 2, axially separating the stators 2 from the thrust plate 3. As shown in the accompanying drawings, the spacer ring 41 serves as both a mounting for the sensor 42 and an adjustment for the axial spacing between the stator 2 and the thrust plate 3. Installing spacers of varying axial widths adjusts the axial spacing between the thrust plate 3 and the stator 2, thereby limiting the rotor's axial amplitude.

[0030] Among them, at least two sensors 42 are installed on the spacer ring 41. The sensors 42 are evenly spaced and distributed along the circumference of the spacer ring 41. Multiple sensors 42 detect simultaneously to ensure the accuracy of monitoring.

[0031] The sensor 42 is installed radially along the spacer ring 41 , and the sensor 42 extends into the gap between the thrust plate 3 and the spacer ring 41 .

[0032] The thrust plate 3 is T-shaped, integrally formed from a large diameter section 32 and a small diameter section 33 having a smaller outer diameter than the large diameter section 32. The radial annular surface formed between the large and small diameter sections 32, 33 serves as the detection surface 31. A sensor 42 is mounted on the spacer ring 41, eliminating the need for a conventional sensor mounting base. The radial annular surface on the outer periphery of the thrust plate 3 serves as the detection surface 31, eliminating the need for a conventional sensor detection ring. This simplifies the structure of the entire monitoring device. The sensor 42 is mounted radially along the spacer ring 41, extending into the gap between the thrust plate 3 and the spacer ring 41. This replaces the conventional axial sensor mounting method with a radial sensor mounting method, achieving radial sensor mounting while measuring axial vibration. This saves axial space and facilitates improved shaft dynamics in high-speed rotating mechanisms.

[0033] The detection surface 31 is aligned with the central axis of the sensor 42. In the initial position, the monitoring position zero point of the sensor 42 is exactly the radial position of the detection surface 31, further improving the accuracy and effectiveness of the monitoring data.

[0034] The spacer ring 41 has radially arranged mounting holes 41.1, and the sensor 42 is positioned in the mounting holes 41.1 and extends into the gap between the thrust plate 3 and the spacer ring 41. Using the mounting holes 41.1 to mount the sensor 42 facilitates quick installation and positioning of the sensor 42 and reduces the space occupied by the sensor 42.

[0035] The present invention also protects a method for monitoring axial vibration of a high-speed rotating mechanism, which is characterized in that: the axial vibration monitoring device for a high-speed rotating mechanism described above monitors axial vibration, and uses an axial vibration sensing component 4 to monitor the axial displacement of the detection surface 31 in real time, thereby monitoring the real-time axial vibration displacement of the rotor 1, so as to realize real-time monitoring of the axial vibration of the high-speed rotating mechanism.

[0036] By adjusting the axial thickness of the spacer ring 41 , the axial gap between the thrust plate 3 and the stator 2 is adjusted, thereby adjusting the axial amplitude of the rotor 1 so that the axial movement of the detection surface 31 is within the detection range of the sensor 42 .

[0037] The above-described method for monitoring axial vibration of a high-speed rotating mechanism utilizes the synchronous vibration of the thrust plate and the rotor. The detection surface serves as the monitoring position of the vibration sensing assembly, monitoring the real-time axial displacement of the detection surface to achieve real-time monitoring of the rotor's axial vibration. This simplifies the installation structure of the vibration sensing assembly and improves monitoring reliability and effectiveness. Spacer ring 41 serves as both a mounting member for sensor 42 and an adjustment member for the axial spacing between stator 2 and thrust plate 3. Installing spacer rings of varying axial widths adjusts the axial spacing between the thrust plate and stator to limit the rotor's axial amplitude.

[0038] The above fully describes the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the embodiments described are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A high-speed rotating mechanism axial vibration monitoring device, comprising a rotor (1), two stators (2) mounted on the rotor (1), and a thrust plate (3) mounted on the rotor (1) and located between the two stators (2), characterized in that: The thrust disc (3) is provided with a detection surface (31), and an axial vibration sensing component (4) is detachably installed between the two stators (2), which is radially aligned with the detection surface (31) and is used to monitor the axial displacement of the detection surface (31); The axial vibration sensing assembly (4) includes a detachable spacer ring (41) mounted between the two stators (2) and a sensor (42) mounted on the spacer ring (41), wherein the sensor (42) is radially aligned with the detection surface (31); The spacer ring (41) is coaxially arranged on the outer periphery of the thrust disc (3) and radially separated from the thrust disc (3). The spacer ring (41) is clamped between the two stators (2) to axially separate the stator (2) and the thrust disc (3); At least two sensors (42) are mounted on the spacer ring (41), and the sensors (42) are evenly spaced and distributed along the circumference of the spacer ring (41); The sensor (42) is installed radially along the spacer ring (41), and the sensor (42) extends into the gap between the thrust plate (3) and the spacer ring (41); The thrust disc (3) is T-shaped and is formed integrally from a large diameter section (32) and a small diameter section (33) having an outer diameter smaller than that of the large diameter section (32). A radial annular surface formed between the large diameter section (32) and the small diameter section (33) is a detection surface (31). The detection surface (31) is aligned with the central axis of the sensor (42).

2. The high-speed rotating mechanism axial vibration monitoring device according to claim 1, characterized in that: The spacer ring (41) is provided with a mounting hole (41.1) arranged in a radial direction. The sensor (42) is positioned in the mounting hole (41.1) and extends into the gap between the thrust plate (3) and the spacer ring (41).

3. A method for monitoring axial vibration of a high-speed rotating mechanism, characterized by: The axial vibration monitoring device of a high-speed rotating mechanism according to any one of claims 1 to 2 is used to monitor the axial vibration, and the axial displacement of the detection surface (31) is monitored in real time using an axial vibration sensing component (4), thereby monitoring the real-time axial vibration displacement of the rotor (1), so as to realize real-time monitoring of the axial vibration of the high-speed rotating mechanism.

4. The method for monitoring axial vibration of a high-speed rotating mechanism according to claim 3, characterized in that: By adjusting the axial thickness of the spacer ring (41), the axial gap between the thrust plate (3) and the stator (2) is adjusted, thereby adjusting the axial amplitude of the rotor (1) so that the axial movement of the detection surface (31) is within the detection range of the sensor (42).

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