Steam turbine vibration monitoring and alarming device

Abstract

The utility model relates to the field of steam turbines, and discloses a steam turbine vibration monitoring and alarming device which comprises a circular mounting ring, three connecting supporting rods movably penetrate through the outer surface of the circular mounting ring, three mounting shells are fixedly mounted on the outer surface of the circular mounting ring, one end of each connecting supporting rod is located in the corresponding mounting shell, and the other end of each connecting supporting rod is located in the corresponding mounting shell. When the output shaft of the steam turbine generates vibration, the vibration is transmitted to the connecting support rod through the roller and monitored through the acceleration sensor, if the vibration of the output shaft is continuously intensified, the connecting support rod compresses the spring and pushes the disc to move towards the interior of the mounting shell to make contact with the travel switch, and the travel switch is triggered and sends a signal to the terminal alarm. The circular installation ring of the device can be directly installed on the outer shell of the steam turbine, meanwhile, the three connecting supporting rods are arranged, the vibration condition of the output shaft of the steam turbine can be monitored from multiple directions, the accuracy of vibration monitoring is improved, and safe operation of equipment is ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of steam turbines, and in particular relates to a steam turbine vibration monitoring and alarm device. Background Art

[0002] The turbine vibration monitoring alarm device is a device used to monitor the operating status of the turbine in real time, especially the vibration condition. Vibration is a common problem in the operation of the turbine. Excessive vibration may cause damage to the equipment and affect the safe and stable operation of the turbine. Therefore, installing a vibration monitoring alarm device is of great significance to ensure the normal operation of the equipment and prevent failures.

[0003] For example, a utility model patent with announcement number CN219244789U discloses a turbine vibration monitoring alarm device, which relates to the field related to turbines and includes a groove seat, wherein guide rails for sliding of a slider are welded on both sides of the interior of the groove seat, a support platform is welded between the guide rails, a high-rigidity spring is installed between the bottom end of the support platform and the inner top end of the groove seat, a connecting rod for fixing the bottom and the touch plate is welded to the middle part of the bottom end of the support platform, a touch switch is fixedly installed at the inner bottom end of the groove seat, a buzzer is fixedly connected to the surface of the groove seat, a support column is detachably connected to the top end of the groove seat, and a bearing for rotating the rotating shaft is welded to the top end of the support column, and the surface of the rotating shaft is detachably connected to the turbine connecting shaft by bolts. The utility model can be used as a support shaft of the turbine, thereby being used in conjunction with the turbine, and has a simple structure, which greatly reduces the manufacturing cost.

[0004] However, it was found in actual use that the rotating shaft of the device was connected to the output connecting shaft of the steam turbine by bolts, so that an alarm signal could be issued when the output shaft of the steam turbine produced abnormal vibration;

[0005] However, the vibration characteristics of the turbine output shaft are diverse, including left-right vibration and up-and-down vibration. When the turbine output shaft produces left-right vibration, the support platform of the device cannot move downward to respond to this type of vibration. At the same time, the turbine output shaft usually directly drives other mechanical components, and the turbine output shaft of the device is connected to the disc shaft, which will affect the normal transmission of the output shaft power and limit the accuracy of vibration monitoring, especially for axial vibration monitoring. For this purpose, a turbine vibration monitoring alarm device is provided. Utility Model Content

[0006] The purpose of this application is to provide a steam turbine vibration monitoring and alarm device in order to solve the above-mentioned problems.

[0007] The technical solution adopted in the present application is as follows: a turbine vibration monitoring and alarm device comprises a circular mounting ring, three connecting rods are movably penetrated on the outer surface of the circular mounting ring, three mounting shells are fixedly installed on the outer surface of the circular mounting ring, one end of the connecting rod is located inside the mounting shell, a rectangular mounting seat is fixedly installed on the end of the connecting rod located inside the circular mounting ring, a roller is rotatably connected inside the rectangular mounting seat, an arc plate is fixedly installed on the outer surface of the connecting rod, a spring is arranged on the outer surface of the connecting rod, one end of the spring is fixed to the top surface of the arc plate, and one end of the spring away from the arc plate is fixed to the inner wall surface of the circular mounting ring, a mounting plate is fixedly installed on the end of the connecting rod located inside the mounting shell, a plurality of pillars are fixedly installed on a side of the mounting plate away from the connecting rod, and a disc is fixedly installed on one end of each of the plurality of pillars, and a travel switch is penetrated and fixedly installed on the side of the mounting shell away from the circular mounting ring.

[0008] In a preferred embodiment, a plurality of fixing blocks are fixedly mounted on the outer surface of the circular mounting ring, and a circular through hole is formed on one side of the plurality of fixing blocks.

[0009] In a preferred embodiment, an acceleration sensor is fixedly mounted on a surface of the mounting plate away from the connecting support rod.

[0010] In a preferred embodiment, a sealing cover plate is fixedly mounted on the front side of the circular mounting ring by setting screws.

[0011] In a preferred embodiment, a polytetrafluoroethylene coating is fixedly mounted on the outer surface of the roller.

[0012] In a preferred embodiment, a sealing cover plate 2 is fixedly mounted on one side of the mounting housing by means of a second screw.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0014] 1. In the present application, due to the adoption of the above-mentioned scheme, the output shaft of the steam turbine passes through the center of the circular mounting ring. At this time, the roller contacts the outer surface of the output shaft. When the output shaft of the steam turbine runs and generates vibration, the vibration is transmitted to the connecting support rod through the roller, and then monitored by the acceleration sensor installed thereon. The acceleration sensor can capture the acceleration signal during the rotation of the output shaft, and then evaluate the vibration condition of the output shaft, including possible problems such as imbalance and misalignment. If the vibration of the output shaft continues to intensify, the connecting support rod will compress the spring and push the disc to move toward the inside of the mounting shell. When the disc touches the travel switch, the travel switch is triggered and sends a signal to the terminal alarm. The alarm immediately issues a voice warning to remind the operator to deal with the vibration problem in time. The circular mounting ring of the device can be directly installed on the outer shell of the steam turbine. At the same time, by setting three connecting support rods, the vibration condition of the steam turbine output shaft can be monitored from multiple directions, the accuracy of vibration monitoring can be improved, and the safe operation of the equipment can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is a schematic diagram of the internal structure of the circular mounting ring of the present application;

[0017] Figure 3 This is a schematic diagram of the mounting plate structure of this application.

[0018] Markings in the figure: 1. circular mounting ring; 2. connecting support rod; 3. mounting shell; 4. rectangular mounting seat; 5. roller; 6. arc plate; 7. spring; 8. mounting plate; 9. pillar; 10. disc; 11. travel switch; 12. fixing block; 13. circular perforation; 14. acceleration sensor; 15. sealing cover plate 1; 16. polytetrafluoroethylene coating; 17. sealing cover plate 2. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] refer to Figure 1 , Figure 2A steam turbine vibration monitoring and alarm device comprises a circular mounting ring 1, a sealing cover plate 15 is fixedly installed on the front side of the circular mounting ring 1 by setting a screw, three connecting rods 2 are movably penetrated on the outer surface of the circular mounting ring 1, three mounting shells 3 are fixedly installed on the outer surface of the circular mounting ring 1, one end of the connecting rod 2 is located inside the mounting shell 3, and a sealing cover plate 2 17 is fixedly installed on one side of the mounting shell 3 by setting a screw 2; the front side of the circular mounting ring 1 is an open structure and is sealed by the sealing cover plate 15, so that when personnel remove the sealing cover plate 15, it is convenient to inspect and maintain the structure installed inside the circular mounting ring 1, and the end of the connecting rod 2 is convenient to protect through the setting of the mounting shell 3.

[0021] The steam turbine output shaft passes through the middle of the circular mounting ring 1, so as to facilitate the subsequent monitoring and alarm of the vibration generated by the operation of the output shaft.

[0022] refer to Figure 1 , Figure 2 A plurality of fixing blocks 12 are fixedly installed on the outer surface of the circular mounting ring 1, and a circular through hole 13 is opened on one side of each of the fixing blocks 12; through the setting of the fixing blocks 12 and the circular through holes 13, it is convenient for personnel to use bolts to pass through the inside of the circular through holes 13 and then fix them to the outer casing of the steam turbine, so that it is convenient to install the circular mounting ring 1 on the outer casing of the steam turbine, and it is convenient to monitor the vibration of the steam turbine output shaft later.

[0023] refer to Figure 1 , Figure 2 A rectangular mounting seat 4 is fixedly installed at one end of the connecting support rod 2 located inside the circular mounting ring 1, and a roller 5 is rotatably connected inside the rectangular mounting seat 4. A polytetrafluoroethylene coating 16 is fixedly installed on the outer surface of the roller 5; the outer surface of the roller 5 is in contact with the outer surface of the turbine output shaft. When the turbine output shaft rotates, the roller 5 is driven to rotate together. By setting the polytetrafluoroethylene coating 16, the friction between the roller 5 and the turbine output shaft can be reduced, so that the turbine output shaft can better output power. The polytetrafluoroethylene coating 16 is a high-performance plastic material with the advantages of good chemical corrosion resistance, heat resistance, low friction coefficient, etc.

[0024] refer to Figure 1 , Figure 2 and Figure 3 An arc plate 6 is fixedly mounted on the outer surface of the connecting support rod 2, and a spring 7 is arranged on the outer surface of the connecting support rod 2, one end of the spring 7 is fixed to the top surface of the arc plate 6; the spring 7 is arranged to facilitate the arc plate 6 to be reset.

[0025] refer to Figure 1 , Figure 2 and Figure 3The end of the spring 7 away from the arc plate 6 is fixed to the inner wall surface of the circular mounting ring 1, and the end of the connecting support rod 2 located inside the mounting shell 3 is fixedly installed with a mounting plate 8, and a plurality of pillars 9 are fixedly installed on a side of the mounting plate 8 away from the connecting support rod 2, and a disc 10 is fixedly installed on one end of the plurality of pillars 9, and a travel switch 11 is fixedly installed on the side of the mounting shell 3 away from the circular mounting ring 1; the signal output end of the travel switch 11 is connected to the external terminal alarm, and when the output shaft of the steam turbine vibrates, the connecting support rod 2 will be driven to move toward the inside of the mounting shell 3, and when the vibration of the output shaft of the steam turbine continues to increase, the disc 10 will contact with the travel switch 11, and after the travel switch 11 contacts, an output signal is obtained to the terminal alarm, and the alarm sends a voice alarm, so that it is convenient for personnel to deal with the vibration generated by the output shaft of the steam turbine in time, and the model of the travel switch 11 can be LX-K1 / 311.

[0026] refer to Figure 1 , Figure 2 and Figure 3 An acceleration sensor 14 is fixedly installed on one side of the mounting plate 8 away from the connecting support rod 2; through the acceleration sensor 14, when the turbine output shaft rotates, it will contact the roller 5, and the roller 5 will transmit the vibration generated by the rotation of the output shaft to the connecting support rod 2. At this time, the acceleration sensor 14 can measure the acceleration signal generated during the rotation of the output shaft, so as to evaluate the vibration of the output shaft. These signals can reflect the imbalance, misalignment and other problems of the output shaft, and monitor the health status of the equipment in real time. The model of the acceleration sensor 14 can be 6233c-100. The acceleration sensor 14 is an existing structure, and there are many models that can be selected according to actual debugging needs.

[0027] The implementation principle of the embodiment of the steam turbine vibration monitoring alarm device of the present application is as follows: the operator first firmly installs the circular mounting ring 1 on the outer casing of the steam turbine through the fixing block 12 and the circular through hole 13, and then the output shaft of the steam turbine passes through the center of the circular mounting ring 1. At this time, the roller 5 contacts the outer surface of the output shaft. When the steam turbine is running and vibrates, the vibration is transmitted to the connecting support rod 2 through the roller 5, and then monitored by the acceleration sensor 14 installed thereon. The acceleration sensor 14 can capture the acceleration signal of the output shaft during the rotation process, and then evaluate the vibration condition of the output shaft, including possible problems such as imbalance and misalignment;

[0028] If the vibration of the output shaft continues to intensify, the connecting support rod 2 will compress the spring 7 and push the disc 10 to move toward the inside of the mounting shell 3. When the disc 10 touches the travel switch 11, the travel switch 11 is triggered and sends a signal to the terminal alarm. The alarm then issues a voice warning to remind the operator to deal with the vibration problem in time. The device is simple in design and easy to operate. The circular mounting ring 1 can be directly installed on the outer shell of the turbine. At the same time, by setting three connecting support rods 2, the vibration of the turbine output shaft can be monitored from multiple directions. When the output shaft vibrates too much, the alarm issued by the travel switch 11 and the terminal alarm can promptly remind personnel to take measures to improve the accuracy of vibration monitoring and ensure the safe operation of the equipment.

[0029] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A steam turbine vibration monitoring alarm device, comprising a circular mounting ring (1), characterized in that: The outer surface of the circular mounting ring (1) is movably provided with three connecting rods (2), the outer surface of the circular mounting ring (1) is fixedly provided with three mounting shells (3), one end of the connecting rod (2) is located inside the mounting shell (3), a rectangular mounting seat (4) is fixedly provided on the end of the connecting rod (2) located inside the circular mounting ring (1), a roller (5) is rotatably connected inside the rectangular mounting seat (4), an arc plate (6) is fixedly provided on the outer surface of the connecting rod (2), and a spring (7) is provided on the outer surface of the connecting rod (2) One end of the spring (7) is fixed to the top surface of the arc plate (6), and the end of the spring (7) away from the arc plate (6) is fixed to the inner wall surface of the circular mounting ring (1). The end of the connecting rod (2) located inside the mounting shell (3) is fixedly mounted with a mounting plate (8), and a plurality of pillars (9) are fixedly mounted on a side of the mounting plate (8) away from the connecting rod (2), and a disc (10) is fixedly mounted on one end of the plurality of pillars (9), and a travel switch (11) is fixedly mounted on a side of the mounting shell (3) away from the circular mounting ring (1).

2. A steam turbine vibration monitoring alarm device as claimed in claim 1, characterized in that: A plurality of fixing blocks (12) are fixedly mounted on the outer surface of the circular mounting ring (1), and a circular through hole (13) is provided on one side of the plurality of fixing blocks (12).

3. A steam turbine vibration monitoring alarm device as claimed in claim 1, characterized in that: An acceleration sensor (14) is fixedly mounted on a side of the mounting plate (8) away from the connecting support rod (2).

4. A steam turbine vibration monitoring alarm device as claimed in claim 1, characterized in that: A sealing cover plate (15) is fixedly mounted on the front side of the circular mounting ring (1) by means of screws.

5. A steam turbine vibration monitoring alarm device as claimed in claim 1, characterized in that: A polytetrafluoroethylene coating (16) is fixedly mounted on the outer surface of the roller (5).

6. A steam turbine vibration monitoring alarm device as claimed in claim 1, characterized in that: A sealing cover plate 2 (17) is fixedly mounted on one side of the mounting housing (3) by means of a second screw.

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