A device for detecting cracks in the main shaft of a high-speed motor

Abstract

The present invention discloses a device for detecting cracks on a high-speed motor spindle. The present invention comprises: a laser, a sensor, a data line, an analysis unit, and a display. The laser is embedded in a stator slot wedge, can slide along the axial direction of the motor and emit a laser beam in a continuous manner. The sensor is tightly attached to the stator slot wedge through silicone rubber. The surface vibration sound waves of the high-speed motor spindle measured by the sensor are transmitted to the analysis unit through a first data line. The analysis unit determines the crack state of the high-speed motor spindle based on the received surface vibration sound waves, and transmits the analysis results to the display through a second data line for display. The patent of the present invention can realize the research and development of a detection device for the crack state of a high-speed motor spindle, analyze the crack state of a high-speed motor spindle in real time, and avoid the problem of equipment stopping due to engineers replacing the high-speed motor spindle. It is an effective method for improving the efficiency of a high-speed motor system.

Description

Technical Field

[0001] The invention relates to the field of high-speed motors, and in particular to a device for detecting cracks on a main shaft of a high-speed motor. Background Art

[0002] High-speed motors have simple structures, high reliability, high system transmission efficiency, and also have the characteristics of high speed, high power density, and fast dynamic response. They are widely used in natural gas drainage, gas collection, processing, and pipeline transportation. High-speed motors rotate at high speed, and the main shaft load is too large instantly, it is in a fatigue state for a long time, or there is an external force collision. The main shaft is prone to cracks, and the cracks continue to spread until the shaft breaks. The life of the high-speed motor main shaft determines the quality and efficiency of the entire high-speed motor system, but at the same time, the high-speed motor main shaft is also the most easily damaged part. The monitoring of the operating status and processing life of the high-speed motor main shaft are issues that both the motor manufacturer and the user must pay attention to. Realizing the prediction of the crack status of the high-speed motor main shaft can effectively improve the operating efficiency of the high-speed motor. The patent of this invention can realize the prediction of the crack status of the high-speed motor main shaft, analyze the crack status of the high-speed motor main shaft in real time, and avoid the problem of equipment stopping due to the replacement of the high-speed motor main shaft by engineers. It is a method that can effectively improve the efficiency of the high-speed motor system. Summary of the invention

[0003] In view of the above problems, the present invention provides a device for detecting cracks in a high-speed motor spindle, which can realize online prediction of the crack status of the high-speed motor spindle.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: the present invention is composed of a laser, a sensor, a data line, an analysis unit and a display; the laser is embedded in a stator slot wedge, the laser can emit a laser beam, and the laser beam can perform circumferential scanning on a rotating high-speed motor main shaft; the laser can slide in the stator slot wedge along the axial direction of the motor, thereby realizing full three-dimensional scanning of the high-speed motor main shaft; the sensor is closely attached to the stator slot wedge, and is used to measure the surface vibration sound wave of the high-speed motor main shaft; the surface vibration sound wave of the high-speed motor main shaft measured by the sensor is transmitted to the analysis unit through a first data line; the analysis unit determines the crack state of the high-speed motor main shaft according to the received surface vibration sound wave, and transmits the analysis result to the display through a second data line for display; the laser adopts a continuous emission mode, and in the continuous emission mode, the frequency of the laser beam emitted by the laser is consistent with the rotation frequency of the high-speed motor main shaft; the sensor is closely attached to the stator slot wedge through silicone rubber, and is used to measure the surface vibration sound wave of the high-speed motor main shaft; the analysis unit and the display are welded to a casing; and a first data line lead-out port is provided on the casing.

[0005] In summary, the high-speed motor main shaft crack detection method and detection device provided by the present invention have the following advantages:

[0006] 1. The detection device can simultaneously scan the circumferential and axial directions of the high-speed motor spindle, realizing full three-dimensional detection of the crack status of the high-speed motor spindle;

[0007] 2. The present invention can analyze the crack status of the high-speed motor spindle in real time, avoiding the problem of equipment stopping due to replacement of the high-speed motor spindle by engineers, and can effectively improve the efficiency of the high-speed motor system;

[0008] 3. The sensor is tightly attached to the stator slot wedge through silicone rubber and is not easy to fall off. It is suitable for occasions where high-speed motors rotate at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic cross-sectional view of a high-speed motor using the high-speed motor spindle crack detection device provided by the present invention;

[0010] Figure 2 It is a partial schematic diagram of the high-speed motor main shaft crack detection device provided by the present invention in the stator slot;

[0011] Figure 3 The invention is a schematic diagram of the axial direction of a high-speed motor using the device for detecting cracks in the main shaft of the high-speed motor provided by the present invention.

[0012] In the figure: 1 laser, 2 stator slot wedge, 3 laser beam, 4 high-speed motor spindle, 5 sensor, 6 first data line, 7 analysis unit, 8 second data line, 9 display, 10 housing, 11 data line outlet. DETAILED DESCRIPTION

[0013] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] See also Figure 1 , Figure 2 and Figure 3As shown: The present invention relates to a high-speed motor main shaft crack detection device, which is composed of a laser 1, a sensor 5, a first data line 6, a second data line 8, an analysis unit 7 and a display 9; the laser 1 is embedded in the stator slot wedge 2, and the laser 1 can emit a laser beam 3, and the laser beam 3 can perform circumferential scanning on the rotating high-speed motor main shaft 4; the laser 1 can slide along the axial direction of the motor in the stator slot wedge 2, thereby realizing a full three-dimensional scanning of the high-speed motor main shaft 4; the sensor 5 is tightly attached to the stator slot wedge 2, and is used to measure the surface vibration sound wave of the high-speed motor main shaft 4; the sensor 5 is connected to the analysis unit 7 through the first data line 6, and the high-speed motor measured by the sensor 5 The surface vibration sound wave of the main shaft 4 is transmitted to the analysis unit 7 through the first data line 6; the analysis unit 7 determines the crack state of the high-speed motor main shaft 4 according to the received surface vibration sound wave, and transmits the analysis result to the display 9 through the second data line 8 for display, and displays the crack state of the high-speed motor main shaft in real time; the laser 1 adopts a continuous emission mode, and the frequency of the laser beam 3 emitted by the laser 1 in the continuous emission mode is consistent with the rotation frequency of the high-speed motor main shaft 4; the sensor 5 is tightly attached to the stator slot wedge 2 through silicone rubber, and is used to measure the surface vibration sound wave of the high-speed motor main shaft 4; the analysis unit 7 and the display 9 are welded on the housing 10; the housing 10 has a first data line lead-out port 11. The patent of the present invention can realize the development of a detection device for the crack state of the high-speed motor main shaft, analyze the crack state of the high-speed motor main shaft in real time, avoid the problem of equipment stopping due to replacement of the high-speed motor main shaft by engineers, and is a method that can effectively improve the efficiency of the high-speed motor system.

[0015] In summary, the present invention is further described in detail by the specific implementation methods of the embodiments shown in the accompanying drawings, but it should not be understood that the protection scope of the present invention is limited to the described examples. After reading the contents of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A high-speed motor main shaft crack detection device, characterized in that: A laser (1) is embedded in a stator slot wedge (2), and the laser (1) can emit a laser beam (3), and the laser beam (3) can perform circumferential scanning on a rotating high-speed motor main shaft (4); the laser (1) can slide in the stator slot wedge (2) along the axial direction of the motor, thereby achieving full three-dimensional scanning of the high-speed motor main shaft (4); a sensor (5) is closely attached to the stator slot wedge (2) and is used to measure the surface vibration sound waves of the high-speed motor main shaft (4); the surface vibration sound waves of the high-speed motor main shaft (4) measured by the sensor (5) are transmitted to an analysis unit (7) via a first data line (6); the analysis unit (7) generates a signal based on the received surface vibration sound waves , judging the crack state of the high-speed motor main shaft (4), and transmitting the analysis result to the display (9) through the second data line (8) for display, so as to facilitate real-time observation of the remaining life of the high-speed motor main shaft; the laser (1) adopts a continuous emission mode, and the frequency of the laser beam (3) emitted by the laser (1) in the continuous emission mode is consistent with the rotation frequency of the high-speed motor main shaft (4); the sensor (5) is closely attached to the stator slot wedge (2) through silicone rubber, and is used to measure the surface vibration sound wave of the high-speed motor main shaft (4); the analysis unit (7) and the display (9) are welded to the housing (10); the housing (10) is provided with a first data line lead-out port (11); The stator slot wedge (2) is clamped in the clamping slot of the stator core. The clamping slot is arranged on the inner ring surface of the stator core. The top of the clamping slot is a plane structure. The middle sections on both sides of the clamping slot are outwardly protruding structures. The bottom is an open structure. The two sides of the stator slot wedge (2) are embedded with the protruding structure of the clamping slot. The sensor (5) of the stator slot wedge (2) is arranged at the open structure below the clamping slot.

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