Steam turbine rotating shaft vibration detection device

Abstract

The utility model discloses a steam turbine rotating shaft vibration detection device, and relates to the field of steam turbines. A steam turbine rotating shaft vibration detection device comprises a mounting plate, the upper end of the mounting plate is fixedly connected with a lower shaft seat, the upper end of the lower shaft seat is provided with an upper shaft seat, a steam turbine rotating shaft body and a detection assembly are rotatably connected between the lower shaft seat and the upper shaft seat, and the detection assembly is located on the upper shaft seat. The detection assembly is used for vibration detection of the steam turbine rotating shaft body. The problems that an existing steam turbine rotating shaft vibration detection device is low in detection precision, due to the fact that a detection probe of a vibration sensor is directly lower than a steam turbine rotating shaft, the detection probe is abraded when a steam turbine rotating shaft body rotates for a long time, the detection probe cannot make contact with the steam turbine rotating shaft all the time, and the detection precision is poor are solved. And thus, the technical problem that the steam turbine rotating shaft cannot be accurately detected is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam turbine field especially relates to a steam turbine rotating shaft vibration detection device. BACKGROUND

[0002] The magnitude of the vibration parameter of the steam turbine unit is one of the very important parameters for describing the operation state, and it is of great significance to comprehensively measure and monitor the vibration information of the unit. When the steam turbine vibration is abnormal, the TSI (steam turbine monitoring and protection instrument) system will send a prompt alarm signal to remind the operator to pay attention. When the unit vibration is seriously abnormal, the protection system will automatically stop the operation of the unit to prevent personal and equipment damage or even catastrophic accidents. A large number of facts have proved that the measurement and monitoring of the steam turbine generator unit vibration directly determine the safe and stable operation of the unit.

[0003] The existing public number: CN217819004U, a steam turbine rotating shaft vibration detection device, including steam turbine rotating shaft, support ring, vibration sensor, detection probe and sleeve, the support ring is arranged around the outer periphery of the steam turbine rotating shaft, and the support ring is not in direct contact with the steam turbine rotating shaft, a through hole is formed in the support ring, the sleeve is fixed on the outer periphery of the through hole in the inner wall of the support ring, the vibration sensor is arranged on the outer wall of the support ring, one end of the detection probe is connected to the vibration sensor, the other end of the detection probe passes through the through hole and the sleeve and abuts on the outer wall of the steam turbine rotating shaft, at least part of the outer wall of the detection probe abuts on the inner wall of the sleeve.

[0004] There are some problems in the above technical scheme: the existing steam turbine rotating shaft vibration detection device has low detection precision. Since the detection probe of the vibration sensor is directly in contact with the steam turbine rotating shaft, the detection probe will be worn under the long-term rotating operation of the steam turbine rotating shaft body, which will prevent the detection probe from being in contact with the steam turbine rotating shaft all the time, and thus the steam turbine rotating shaft cannot be accurately detected. Therefore, it is necessary to provide a steam turbine rotating shaft vibration detection device to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a steam turbine rotating shaft vibration detection device, solved the existing steam turbine rotating shaft vibration detection device, detection precision is low, because the detection probe of vibration sensor is directly in contact with the steam turbine rotating shaft, the detection probe will be worn under the long-term rotating operation of the steam turbine rotating shaft body, which will prevent the detection probe from being in contact with the steam turbine rotating shaft all the time, and thus the steam turbine rotating shaft cannot be accurately detected.

[0006] To solve the above technical problems, the utility model provides a steam turbine rotating shaft vibration detection device, comprising:

[0007] The lower shaft base is provided with an upper shaft base at the upper end thereof, and a steam turbine rotating shaft body is rotatably connected between the lower shaft base and the upper shaft base.

[0008] The detection assembly is arranged on the upper shaft base and is used for detecting the vibration of the steam turbine rotating shaft body.

[0009] Preferably, the detection assembly comprises a threaded hole, a detection hole is arranged at the lower end of the threaded hole, and a threaded seat is threadedly connected in the threaded hole.

[0010] Preferably, a vibration sensor is fixedly connected to the upper end of the threaded seat, an output end of the vibration sensor penetrates through the lower end of the threaded seat and is fixedly connected with a detection tube, and the lower end of the detection tube extends into the detection hole.

[0011] Preferably, a spring is fixedly connected to the upper end in the detection tube, a fixed plate is fixedly connected to the lower end of the spring, a detection needle is fixedly connected to the lower end of the fixed plate, the lower end of the detection needle penetrates through the lower end of the detection tube and is in contact with the surface of the steam turbine rotating shaft body, a signal line is fixedly connected to the upper end of the detection needle, and the signal line is electrically connected with the vibration sensor.

[0012] Preferably, assembly holes are arranged around the upper end of the mounting plate, and the number of the assembly holes is four.

[0013] Preferably, first fixing blocks are fixedly connected to the upper ends of the two sides of the lower shaft base, second fixing blocks are fixedly connected to the lower ends of the two sides of the upper shaft base, and the first fixing blocks and the second fixing blocks are fixedly connected through bolts.

[0014] Compared with the related art, the steam turbine rotating shaft vibration detection device has the following beneficial effects:

[0015] The steam turbine rotating shaft vibration detection device has the functions of facilitating the fixation of the vibration sensor in the use process and solving the problem of inconvenient fixation of the vibration sensor in the use process.

[0016] The steam turbine rotating shaft vibration detection device has the functions of facilitating the compression contact of the detection needle and the steam turbine rotating shaft body in the use process and solving the problem of poor contact of the detection needle and the steam turbine rotating shaft body in the use process.

[0017] The utility model provides a steam turbine rotating shaft vibration detection device, through the setting of bolt, to first fixed block and second fixed block in the use process has played convenient disassembly and assembly's effect, solved first fixed block and second fixed block in the use process inconvenient disassembly and assembly's problem. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 A preferred embodiment structure schematic view of the steam turbine rotating shaft vibration detection device is provided.

[0019] Fig. 2 A threaded hole and threaded seat structure expansion schematic view of the utility model is provided.

[0020] Fig. 3 A detection tube structure sectional view of the utility model is provided.

[0021] Marked number in the drawing: 1, mounting plate;2, lower axle seat;3, upper axle seat;4, steam turbine rotating shaft main body;5, detection assembly;51, threaded hole;52, detection hole;53, threaded seat;54, vibration sensor;55, detection tube;56, spring;57, fixed plate;58, detection needle;59, signal line;6, first fixed block;7, second fixed block;8, bolt. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model.

[0023] Embodiment one:

[0024] Please refer to Figs. 1-3 The utility model provides a technical scheme: a steam turbine rotating shaft vibration detection device, comprising: mounting plate 1, the upper end fixed connection of mounting plate 1 has lower axle seat 2, the upper end of lower axle seat 2 is provided with upper axle seat 3, and steam turbine rotating shaft main body 4 is rotatably connected between lower axle seat 2 and upper axle seat 3, detection assembly 5, detection assembly 5 is located on upper axle seat 3, and detection assembly 5 is used for the vibration detection of steam turbine rotating shaft main body 4.

[0025] In the embodiment, vibration sensor 54 is first installed on upper axle seat 3 through threaded seat 53 and threaded hole 51, at this time detection tube 55 is inserted into detection hole 52, detection needle 58 on detection tube 55 is in contact with the surface of steam turbine rotating shaft main body 4, and spring 56 presses fixed plate 57 downwardly, and fixed plate 57 presses detection needle 58 downwardly.

[0026] Embodiment two:

[0027] Please refer to Figs. 1-3As shown, on the basis of the embodiment one, the utility model provides a technical scheme: detection component 5 includes threaded hole 51, the lower end of threaded hole 51 inside is equipped with detection hole 52, the inside threaded hole 51 is connected with threaded seat 53, the upper end of threaded seat 53 is fixedly connected with vibration sensor 54, the output of vibration sensor 54 is fixedly connected with detection tube 55 and is connected with threaded seat 53 lower end and reaches, and detection tube 55 lower end extends to detection hole 52, the upper end of detection tube 55 inside is fixedly connected with spring 56, the lower end of spring 56 is fixedly connected with fixed plate 57, the lower end of fixed plate 57 is fixedly connected with detection needle 58, and the lower end of detection needle 58 is fixedly connected with signal line 59 and is connected with threaded seat 53 lower end and reaches steam turbine rotor main body 4 surface contact, and the upper end of detection needle 58 is fixedly connected with signal line 59, and signal line 59 is electrically connected between vibration sensor 54, and the four around of mounting plate 1 upper end is equipped with assembly hole, and the number of assembly hole is four, and the upper end of both sides of lower shaft seat 2 is fixedly connected with first fixed block 6, and the lower end of both sides of upper shaft seat 3 is fixedly connected with second fixed block 7, and first fixed block 6 and second fixed block 7 are fixedly connected through bolt 8.

[0028] In this embodiment: keep detection needle 58 always with steam turbine rotor main body 4 low, when detection needle 58 detects that steam turbine rotor main body 4 appears vibration, detection needle 58 is fed back to vibration sensor 54 through signal line 59.

[0029] The working principle of the steam turbine rotor vibration detection device provided by the utility model is as follows:

[0030] The first innovation point implementation step is:

[0031] First step: vibration sensor 54 is installed on upper shaft seat 3 through threaded seat 53 and threaded hole 51 first, at this time, detection tube 55 is inserted into detection hole 52;

[0032] Second step: detection needle 58 on detection tube 55 is in contact with the surface of steam turbine rotor main body 4, and spring 56 presses fixed plate 57 downwardly, and fixed plate 57 presses detection needle 58 downwardly.

[0033] The second innovation point implementation step is:

[0034] First step: keep detection needle 58 always with steam turbine rotor main body 4 low, when detection needle 58 detects that steam turbine rotor main body 4 appears vibration, and

[0035] Second step: detection needle 58 is fed back to vibration sensor 54 through signal line 59.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steam turbine rotor vibration detection apparatus, characterized by: Include: The upper end of the mounting plate (1) is fixedly connected with the lower shaft seat (2), the upper end of the lower shaft seat (2) is provided with the upper shaft seat (3), the lower shaft seat (2) and the upper shaft seat (3) are rotatably connected with the steam turbine shaft body (4); Detection assembly (5), the detection assembly (5) is located on the upper shaft seat (3), the detection assembly (5) is used for detecting the vibration of the steam turbine shaft body (4).

2. A turbine shaft vibration detection device according to claim 1, wherein The detection assembly (5) comprises a threaded hole (51), a detection hole (52) is formed in the lower end of the threaded hole (51), and a threaded seat (53) is screwed in the threaded hole (51).

3. A turbine shaft vibration detection device according to claim 2, wherein The upper end of the threaded seat (53) is fixedly connected with the vibration sensor (54), the output end of the vibration sensor (54) penetrates to the lower end of the threaded seat (53) and is fixedly connected with the detection tube (55), the lower end of the detection tube (55) extends into the detection hole (52).

4. A turbine shaft vibration detection device according to claim 3, wherein The upper end of the detection tube (55) is fixedly connected with the spring (56), the lower end of the spring (56) is fixedly connected with the fixed plate (57), the lower end of the fixed plate (57) is fixedly connected with the detection needle (58), the lower end of the detection needle (58) penetrates to the lower end of the detection tube (55) and contacts with the surface of the steam turbine shaft body (4), the upper end of the detection needle (58) is fixedly connected with the signal line (59), and the signal line (59) is electrically connected between the vibration sensor (54).

5. A turbine shaft vibration detection device according to claim 1, wherein The upper end of the mounting plate (1) is provided with four assembly holes.

6. A turbine shaft vibration detection device according to claim 1, wherein The upper end of the lower shaft seat (2) is fixedly connected with the first fixed block (6), the lower end of the upper shaft seat (3) is fixedly connected with the second fixed block (7), and the first fixed block (6) and the second fixed block (7) are fixedly connected through the bolts (8).

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