Bearing detection device for steam turbine

Abstract

The utility model provides a bearing detection device for a steam turbine, which belongs to the technical field of bearing detection and comprises a shell, a weighing machine is arranged at the bottom of an inner cavity of the shell, a supporting assembly is arranged above the weighing machine and used for placing a bearing and realizing rotation of the bearing, an ultrasonic detection assembly is further arranged in the shell, and the ultrasonic detection assembly is connected with the weighing machine. The ultrasonic detection assembly is located over the supporting assembly. The device can prevent the optical sensor from being exposed in the external environment for a long time and polluting the camera, realizes the ultrasonic automatic detection of the steam turbine bearing, and improves the detection precision and efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing detection, and in particular relates to a bearing detection device for a steam turbine. Background Art

[0002] In electric power production, steam turbines are important large-scale equipment. Since steam turbines are subject to heavy loads and long operating times during use, high requirements are placed on the strength and reliability of steam turbine components.

[0003] During the use of the steam turbine, the main shaft bearing is subjected to large forces and the amount of movement is accumulated, so it is more likely to have defects such as wear. The relative position accuracy and shape accuracy of the main shaft bearing have an important impact on the overall operating stability and reliability of the steam turbine.

[0004] Therefore, it is necessary to conduct regular inspections on turbine bearings to ensure that they meet the requirements of use. Currently, the inspection of turbine bearings is mainly carried out by scanning the bearing surface with optical sensors to observe the wear of the bearings, and by using ultrasonic flaw detectors to inspect the inside of the bearings to detect whether there are cracks inside the bearings.

[0005] When using an optical sensor to scan the bearing surface, since the camera of the optical sensor is mostly exposed to the external environment, dust is generated on the camera surface after long-term use, thereby affecting the scanning accuracy of the optical sensor. When using an ultrasonic flaw detector to inspect the inside of the bearing, it is usually necessary to manually hold the ultrasonic flaw detector to operate, which is inefficient.

[0006] In addition, the existing detection device has a single function and can only detect the surface of the bearing, but cannot detect the temperature of the bearing. In addition, the bearings used in steam turbines are large in size and heavy in weight, and they need to be manually turned over for all-round detection during the detection process, which causes high labor intensity for the staff. Utility Model Content

[0007] In view of the defects or shortcomings in the prior art, the utility model provides a bearing detection device for a steam turbine, which can prevent the optical sensor from being exposed to the external environment for a long time and contaminating the camera, and at the same time realize ultrasonic automatic detection of steam turbine bearings to improve detection accuracy and efficiency.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] In the first aspect, an embodiment of the utility model provides a bearing detection device for a steam turbine, comprising a shell, a weighing machine is arranged at the bottom of the inner cavity of the shell, a support assembly is arranged above the weighing machine, and is used to place the bearing and realize the rotation of the bearing, and an ultrasonic detection assembly is also arranged in the shell, and the ultrasonic detection assembly is located directly above the support assembly.

[0010] Furthermore, the support assembly includes a first support plate and a rotating shaft. There are two first support plates, which are symmetrically arranged on the upper surface of the weighing machine. The rotating shaft is located on the upper part of the two first support plates, and both ends of the rotating shaft are rotatably connected to the two first support plates respectively.

[0011] Furthermore, a first motor is arranged on the outer side of the shell, and one end of the rotating shaft passes through the side wall of the shell and is fixedly connected to the output shaft of the first motor.

[0012] Furthermore, the ultrasonic detection component includes a fixing plate, the fixing plate is fixed on the top surface of the inner cavity of the shell, a limiting groove is provided on the bottom surface of the fixing plate, and a linear module is arranged in the limiting groove.

[0013] Furthermore, a plurality of electric telescopic rods are arranged on the slider of the linear module, one end of the electric telescopic rod is fixedly connected to the bottom surface of the slider, and the other end is fixedly connected to an ultrasonic detection probe, and the ultrasonic detection probe is arranged opposite to the rotating shaft.

[0014] Furthermore, a controller is provided on the top of the shell, and the controller is electrically connected to the first motor, the electric telescopic rod and the ultrasonic detection probe respectively. A control panel is provided on the controller for observing the wave amplitude value of the ultrasonic detection probe during detection.

[0015] Furthermore, the controller is also electrically connected to an infrared temperature sensor, which is fixed on the top surface of the inner cavity of the shell and located on one side of the fixing plate.

[0016] In the second aspect, an embodiment of the utility model provides a bearing detection device for a steam turbine, comprising a shell, a weighing machine is arranged at the bottom of the inner cavity of the shell, a flip assembly is arranged above the weighing machine, and an optical sensor is arranged above the shell, and the optical sensor is located directly above the flip assembly and is arranged directly opposite to the flip assembly.

[0017] Furthermore, the flip assembly includes a second support plate, two of which are symmetrically arranged on the upper surface of the weighing machine, and the upper parts of the two second support plates are rotatably connected to a clamping block, one end of the clamping block is provided with a groove, and the two grooves on the two clamping blocks are arranged opposite to each other.

[0018] Furthermore, the end of the clamping block away from the groove is fixedly connected to a rotating shaft, and the clamping block is rotatably connected to the second support plate through the rotating shaft. A second motor is also provided in the inner cavity of the shell, and the second motor is located on one side of one of the support plates. The rotating shaft of the clamping block close to the second motor passes through the second support plate and is fixedly connected to the output shaft of the second motor.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The utility model arranges a support assembly and an ultrasonic detection assembly in a housing, and the ultrasonic detection assembly is arranged directly above the support assembly, and the support assembly is used to fix the bearing and rotate the bearing, thereby improving the detection efficiency when ultrasonic detection of the bearing is used.

[0021] 2. The utility model places the optical sensor in the housing to prevent dust in the external environment from contaminating the camera and affecting the detection accuracy. At the same time, a flip mechanism is provided under the optical sensor, and the bearing is flipped by the flip mechanism, which effectively reduces the labor intensity of the staff.

[0022] 3. The utility model arranges an infrared temperature sensor in the housing, and the infrared temperature sensor is arranged above the support assembly, so that the temperature change of the bearing during the rotation process can be detected by the infrared temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the external structure of the detection device in the first embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the detection device in the first embodiment of the utility model;

[0025] Figure 3 This is a connection diagram of a slider, an electric telescopic rod and an ultrasonic detection probe in Embodiment 1 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of the detection device in the second embodiment of the present utility model;

[0027] Among them, 1. Shell; 201. First support plate; 202. Rotating shaft; 3. Weighing machine; 4. First motor; 501. Fixed plate; 502. Limiting groove; 503. Linear module; 504. Slider; 505. Electric telescopic rod; 506. Detection probe; 6. Controller; 7. Infrared temperature sensor; 8. Cabinet door; 9. Visual window; 101. Second support plate; 102. Clamping block; 103. Second motor; 11. Optical sensor. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] A typical implementation of the present utility model is as follows Figure 1 and Figure 2 As shown, a bearing detection device for a steam turbine includes a shell 1. An inner cavity is provided inside the shell 1 for placing a detection device to prevent the detection device from being affected by the external environment when working. A visual window 9 is provided on the upper part of a cabinet door 8 on the front side of the shell 1, so that the inner cavity of the shell 1 can be observed. A weighing machine 3 is provided at the bottom of the inner cavity of the shell 1, and the weighing machine 3 is provided to detect the weight of the bearing.

[0030] A support assembly is arranged above the weighing machine 3, and the support assembly includes a first support plate 201 and a rotating shaft 202. Two first support plates 201 are arranged, and the two first support plates 201 are symmetrically arranged on the upper surface of the weighing machine 3. The rotating shaft 202 is located on the upper parts of the two first support plates 201, and the two ends of the rotating shaft 202 are rotatably connected to the two first support plates 201 respectively. A first motor 4 is arranged on the outer side of the shell 1, and one end of the rotating shaft 202 passes through the side wall of the shell 1 and is fixedly connected to the output shaft of the first motor 4. The rotating shaft 202 is driven to rotate by the first motor 4, and the bearing to be tested is sleeved on the outer side of the rotating shaft 202, thereby driving the bearing to rotate and testing the bearing.

[0031] An ultrasonic detection component is also provided in the housing 1, and the ultrasonic detection component is located directly above the support component. The ultrasonic detection component includes a fixing plate 501, and the fixing plate 501 is fixed on the top surface of the inner cavity of the housing 1. A limiting groove 502 is provided on the bottom surface of the fixing plate 501, and a linear module 503 is provided in the limiting groove 502. A slider 504 on the linear module 503 can slide along the axial direction of the rotating shaft 202, and a plurality of electric telescopic rods 505 are provided on the bottom surface of the slider 504. Figure 3 As shown, in this embodiment, two electric telescopic rods 505 are provided, and the two electric telescopic rods 505 are symmetrically arranged. One end of the electric telescopic rod 505 is fixedly connected to the bottom surface of the slider 504, and the other end is fixedly connected to an ultrasonic detection probe 506. The ultrasonic detection probe 506 is arranged opposite to the rotating shaft 202. When the bearing to be detected is sleeved on the rotating shaft 202, the electric telescopic rod 505 is used to move the ultrasonic detection probe 506 close to the bearing to be detected, so as to detect impurities and cracks on the surface and inside of the bearing. Using the ultrasonic detection probe 506 to detect the bearing can avoid the reduction of detection accuracy due to dust on the surface of the optical camera, which is beneficial to improving the detection accuracy.

[0032] A controller 6 is provided on the top of the shell 1, and the controller 6 is electrically connected to the first motor 4, the electric telescopic rod 505 and the ultrasonic detection probe 506 respectively. A control panel is provided on the controller 6, and the wave amplitude value of the ultrasonic detection probe 506 during detection can be observed through the control panel.

[0033] The controller 6 is also electrically connected to the infrared temperature sensor 7, which is fixed on the top surface of the inner cavity of the shell 1 and is located on one side of the fixed plate 501. The model of the infrared temperature sensor 7 is LN-FC255012. The infrared temperature sensor 7 is used to detect the temperature of various parts of the bearing when the first motor 4 drives the bearing to rotate rapidly.

[0034] When in use, firstly, the bearing sleeve is arranged on the outside of the rotating shaft 202 and moved to the central position, and the electric telescopic rod 505 drives the ultrasonic detection probe 506 to move downward until the detection probe 506 contacts the upper end of the bearing, and the first motor 4 is started. The first motor 4 drives the rotating shaft 202 and the bearing to rotate slowly, so that the ultrasonic detection probe 506 slides on the bearing surface and moves along the axis direction of the rotating shaft 202 through the slider 504, so as to perform all-round detection of the bearing surface. After the detection is completed, the electric telescopic rod 505 drives the detection probe 506 to retract upward and separate from the bearing, and judge whether the bearing has impurities or cracks by observing the wave amplitude value displayed on the control panel of the controller 6. The first motor 4 drives the rotating shaft 202 and the bearing to rotate rapidly, and the temperature change of the bearing during the rotation process is detected by the infrared temperature sensor 7 and reflected on the control panel.

[0035] Embodiment 2

[0036] Another implementation mode of the present invention is as follows: Figure 4 As shown, a bearing detection device for a steam turbine comprises a shell 1, a weighing machine 3 is arranged at the bottom of the inner cavity of the shell 1, a flip assembly is arranged above the weighing machine 3, the flip assembly comprises a second support plate 101, two second support plates 101 are provided, the two second support plates 101 are symmetrically arranged on the upper surface of the weighing machine 3, the upper parts of the two second support plates 101 are rotatably connected with a clamping block 102, one end of the clamping block 102 is provided with a groove, the two grooves on the two clamping blocks are arranged oppositely, so that the two grooves form a placement groove for placing the bearing, the end of the clamping block 102 away from the groove is fixedly connected with a rotating shaft, and the clamping block 102 is rotatably connected to the second support plate 101 through the rotating shaft.

[0037] A second motor 103 is also provided in the inner cavity of the shell 1. The second motor 103 is located on one side of one of the second support plates 101. The rotating shaft of the clamping block 102 close to the second motor 103 passes through the second support plate 101 and is fixedly connected to the output shaft of the second motor 103, so that the clamping block 102 is driven to rotate by the second motor 103, and the bearing to be inspected is flipped during the inspection process.

[0038] An optical sensor 11 is arranged above the shell 1. The optical sensor 11 is located just above the flip assembly and is arranged opposite to the flip assembly. The model of the optical sensor 11 is JX-F38P. The optical sensor 11 is electrically connected to a controller 6 arranged outside the shell 1. The controller 6 is provided with a control panel for displaying the detection content. By arranging the optical sensor 11 in the inner cavity of the shell 1, it can effectively prevent dust from falling on the outside from blocking the camera of the optical sensor 11 and affecting the scanning accuracy. The second motor 103 drives the clamping block 102 to flip, which is beneficial to the full-scale scanning of the bearing inside the device, and the bearing can be automatically flipped during the detection process, which is beneficial to reduce the labor intensity of the staff.

[0039] When in use, the bearing is clamped between the two sets of clamping blocks 102, and the optical sensor 11 is started. The optical sensor 11 detects the bearing surface through a camera, and the second motor 103 is started. The clamping blocks 102 and the bearing are driven to rotate by the second motor 103, so as to flip the shaft, so that the optical sensor 11 performs all-round detection of the bearing, and finally converts it into a signal to reflect to the controller 6, and displays it on the control panel of the controller 6.

[0040] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bearing detection device for a steam turbine, characterized in that: It comprises a shell, a weighing machine is arranged at the bottom of the inner cavity of the shell, a supporting assembly is arranged above the weighing machine for placing the bearing and realizing the bearing rotation, an ultrasonic detection assembly is also arranged in the shell, and the ultrasonic detection assembly is located directly above the supporting assembly.

2. A steam turbine bearing detection device according to claim 1, characterized in that: The support assembly includes a first support plate and a rotating shaft. There are two first support plates, which are symmetrically arranged on the upper surface of the weighing machine. The rotating shaft is located on the upper parts of the two first support plates, and both ends of the rotating shaft are rotatably connected to the two first support plates respectively.

3. A steam turbine bearing detection device as claimed in claim 2, characterized in that: A first motor is disposed on the outer side of the shell, and one end of the rotating shaft passes through the side wall of the shell and is fixedly connected to the output shaft of the first motor.

4. A steam turbine bearing detection device as claimed in claim 3, characterized in that: The ultrasonic detection component comprises a fixing plate, which is fixed on the top surface of the inner cavity of the shell. A limiting groove is provided on the bottom surface of the fixing plate, and a linear module is arranged in the limiting groove.

5. A steam turbine bearing detection device as claimed in claim 4, characterized in that: A plurality of electric telescopic rods are arranged on the slider of the linear module, one end of the electric telescopic rod is fixedly connected to the bottom surface of the slider, and the other end is fixedly connected to an ultrasonic detection probe, and the ultrasonic detection probe is arranged opposite to the rotating shaft.

6. A steam turbine bearing detection device as claimed in claim 5, characterized in that: A controller is arranged on the top of the shell, and the controller is electrically connected to the first motor, the electric telescopic rod and the ultrasonic detection probe respectively. A control panel is arranged on the controller for observing the wave amplitude value of the ultrasonic detection probe during detection.

7. A steam turbine bearing detection device as claimed in claim 6, characterized in that: The controller is also electrically connected to an infrared temperature sensor, which is fixed on the top surface of the inner cavity of the shell and located on one side of the fixing plate.

8. A bearing detection device for a steam turbine, characterized in that: It comprises a shell, a weighing machine is arranged at the bottom of the inner cavity of the shell, a flip assembly is arranged above the weighing machine, an optical sensor is arranged above the shell, and the optical sensor is located just above the flip assembly and is arranged directly opposite to the flip assembly.

9. A steam turbine bearing detection device as claimed in claim 8, characterized in that: The flip assembly includes a second support plate, two of which are symmetrically arranged on the upper surface of the weighing machine, and the upper parts of the two second support plates are rotatably connected to a clamping block, one end of the clamping block is provided with a groove, and the two grooves on the two clamping blocks are arranged opposite to each other.

10. A steam turbine bearing detection device according to claim 9, characterized in that: The end of the clamping block away from the groove is fixedly connected to a rotating shaft, and the clamping block is rotatably connected to the second support plate through the rotating shaft. A second motor is also provided in the inner cavity of the shell, and the second motor is located on one side of one of the support plates. The rotating shaft of the clamping block close to the second motor passes through the second support plate and is fixedly connected to the output shaft of the second motor.

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