Shafting vibration testing device of steam turbine generator unit

Abstract

The utility model discloses a shafting vibration testing device for a steam turbine generator unit, and belongs to the technical field of shafting of steam turbine generator units. The device comprises a unit supporting frame, a steam turbine generator unit is arranged in the center of the top of the unit supporting frame, electric brush covers are arranged on the end face of the steam turbine generator unit side by side, transmission shafts extending into the electric brush covers are arranged in the middle of the steam turbine generator unit, and vibration detection frames connected with the transmission shafts are arranged in the electric brush covers. According to the utility model, water in the water tank is promoted to overflow through vibration, the alarm switch and the second air bag are triggered according to the water absorption weight increment principle of the water absorption padding, wet alarm reminding in the vibration detection frame is realized, and a conical pen is driven by magnetic attraction to track and stroke paper distributed on the disc to display the rotation axis point of the transmission shaft, so that the detection accuracy is improved. In this way, real-time comparison and understanding are carried out by combining the alarm and the steam turbine generator unit shaft system axis vibration with the rotation amplitude track, and the vibration detection accuracy of the steam turbine generator unit shaft system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection of shaft systems of steam turbine generator sets, in particular to a vibration testing device for shaft systems of steam turbine generator sets. Background Art

[0002] The shaft system of a steam turbine generator set is a rotating body composed of the rotors of the steam turbine generator set connected on the same center line by a coupling. The lateral and axial vibrations, torsional vibrations, critical speeds and stability problems reflected in the operation of the unit are all related to the shaft system characteristics of the steam turbine generator set, and the shaft system characteristics are different from the characteristics of a single rotor;

[0003] In combination with the above content, it should be explained that during the vibration detection of the existing steam turbine generator set shaft system, it is usually necessary to disassemble the parts or detect the amplitude generated by the overall operation, which has the problem of shaft system detection accuracy deviation, and the detection result is only the vibration information of the steam turbine generator set shaft system at that time point, which is greatly different from the actual operation of the steam turbine generator set shaft system;

[0004] In view of the above technical defects, a solution is now proposed. Utility Model Content

[0005] The utility model aims to provide a steam turbine generator set shaft system vibration testing device, which is used for real-time detection of the vibration stability of the steam turbine generator set shaft system during operation, utilizes a ball to contact the transmission shaft, cooperates with a brush cover to limit and fix the transmission shaft, and transmits the vibration generated during the operation of the transmission shaft to a water tank, utilizes vibration to cause water in the water tank to overflow, and triggers an alarm switch and a second airbag due to the principle of water absorption and weight increase of the water absorbent pad, thereby realizing a wet alarm reminder inside the vibration detection frame, and the water weight guides the air to cause the deformation of the water tank cavity to shrink, thereby ensuring that the water boundary in the water tank is always within the controllable range of micro-vibration overflow, which is helpful for real-time vibration detection and alarm reminder of the steam turbine generator set shaft system to solve the proposed problem.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a steam turbine generator set shaft system vibration test device, including a unit support frame, a steam turbine generator set is arranged at the top center of the unit support frame, brush covers are arranged side by side on the end faces of the steam turbine generator set, and a transmission shaft extending into the brush cover is arranged in the middle of the steam turbine generator set, a vibration detection frame connected to the transmission shaft is arranged inside the brush cover, the vibration detection frame includes an inner arc groove and a water groove, and paper roll main boxes located on the inner wall of the brush cover are symmetrically arranged on both sides of the vibration detection frame;

[0007] A paper roll auxiliary box is arranged on the side of the paper roll main box, a driving motor is arranged at the bottom of the box of the paper roll main box, an axial paper display mechanism is arranged on the outer wall of one end of the brush cover, the axial paper display mechanism includes a paper chute and a disc, and a cone pen is arranged inside the disc.

[0008] Preferably, an outer cover shell is arranged outside the steam turbine generator set, a stabilizing frame connected to the unit support frame is arranged at the bottom of one end of the outer cover shell, an oil seal pipe fitting sleeved with the transmission shaft is arranged in the middle of one end of the outer cover shell, and a magnetic core block is embedded in the middle of the cross section of one end of the transmission shaft.

[0009] Preferably, a tempered transparent cover is hinged on the top of the brush cover, inner brackets are provided on the inner walls at both ends of the brush cover, and a sliding column connected to the vibration detection frame is provided on the top of the inner bracket.

[0010] Preferably, a plurality of groups of balls are arranged on the inner wall of the inner arc groove, a push rod extending to the inside of the water tank is arranged on the top of the balls, a support plate sliding along the inner wall of the water tank is arranged on the top of the push rod, and a water-isolating membrane is arranged on the inner wall of the water tank.

[0011] Preferably, a first airbag is embedded on the inner walls on both sides of the water tank, absorbent pads are provided at the bottom of both sides of the water tank, an alarm switch is provided at the bottom of the absorbent pads, and a second airbag is provided around the alarm switch, a one-way valve connected to the first airbag is provided on the side of the second airbag, and an alarm connected to the alarm switch wire is provided on the inner walls on both sides of the vibration detection frame.

[0012] Preferably, a shaft is provided on the top output end of the driving motor, a paper roll is sleeved on the outer periphery of the shaft, and a side opening is penetrated through the end face of the paper roll main box.

[0013] Preferably, the paper chute is symmetrically provided with side inlets and side outlets, a glass cover is hingedly connected to the outer side of one end of the paper chute, the disc is located in the middle of the paper chute, and an active magnetic block connected to the cone pen is arranged inside the disc.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model is to provide a vibration detection frame inside the brush cover to detect the vibration stability of the shaft system of the steam turbine generator set in real time during operation, use the ball to contact the transmission shaft, cooperate with the brush cover to limit and fix the transmission shaft, and transmit the vibration generated during the operation of the transmission shaft to the water tank, use the vibration to cause the water in the water tank to overflow, and trigger the alarm switch and the second airbag by the principle of water absorption and weight increase of the water absorbent pad, so as to realize the wet alarm reminder inside the vibration detection frame, and the water weight guides the air to cause the deformation of the inner cavity of the water tank to shrink, so as to ensure that the water limit in the water tank is always within the controllable range of micro-vibration overflow, which is helpful for the real-time vibration detection and alarm reminder of the shaft system of the steam turbine generator set;

[0016] (2) The utility model uses an axis paper display mechanism and a paper roll main box in conjunction with a transmission shaft, and uses magnetic attraction to drive a cone pen to draw a trajectory on the paper surface arranged on a disc to display the rotation axis point of the transmission shaft. Based on this, the alarm and the axis vibration and rotation amplitude trajectory of the steam turbine generator set shaft system are combined to perform real-time comparison and understanding, which helps to improve the vibration detection accuracy of the steam turbine generator set shaft system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings;

[0018] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection structure between the steam turbine generator set and the unit support frame of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the transmission shaft and the brush cover of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the vibration detection frame of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the brush cover of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the main box of the paper roll of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the axis paper display mechanism of the utility model.

[0025] Legend: 1. Unit support frame; 2. Steam turbine generator set; 201. Outer cover; 202. Transmission shaft; 203. Stabilizer; 204. Oil seal pipe; 205. Magnetic core block; 3. Brush cover; 301. Tempered transparent cover; 302. Sliding column; 303. Inner bracket; 4. Axis paper display mechanism; 401. Glass cover; 402. Side inlet; 403. Paper chute; 404. Disc; 405. Movable magnetic block; 406 , cone pen; 407, side outlet; 5, vibration detection frame; 501, inner arc groove; 502, ball bearing; 503, push rod; 504, support plate; 505, water tank; 506, first air bag; 507, second air bag; 508, alarm switch; 509, absorbent pad; 510, alarm; 6, paper roll main box; 601, paper roll auxiliary box; 602, shaft rod; 603, paper roll drum; 604, drive motor; 605, side outlet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1:

[0028] This embodiment is used to solve the problem that during the vibration detection of the shaft system of the existing steam turbine generator set, it is usually necessary to disassemble the parts or detect the amplitude generated by the overall operation, which has the problem of shaft system detection accuracy deviation, and the detection result is only the vibration information of the shaft system of the steam turbine generator set at that time point, which is greatly different from the problem of the shaft system of the steam turbine generator set during actual operation.

[0029] See also Figure 1 - Figure 7 As shown, this embodiment is a steam turbine generator set shaft system vibration test device, including a unit support frame 1, a steam turbine generator set 2 is arranged at the top center of the unit support frame 1, brush covers 3 are arranged side by side on the end surface of the steam turbine generator set 2, and a transmission shaft 202 extending into the brush cover 3 is arranged in the middle of the steam turbine generator set 2, a vibration detection frame 5 connected to the transmission shaft 202 is arranged inside the brush cover 3, the vibration detection frame 5 includes an inner arc groove 501 and a water tank 505, and paper roll main boxes 6 located on the inner wall of the brush cover 3 are symmetrically arranged on both sides of the vibration detection frame 5;

[0030] The steam turbine generator set 2 is provided with an outer casing 201 on the outside, a stabilizing frame 203 connected to the unit support frame 1 is provided at the bottom of one end of the outer casing 201, an oil seal pipe 204 sleeved with the transmission shaft 202 is provided in the middle of one end of the outer casing 201, and a magnetic core block 205 is embedded in the middle of the cross section of one end of the transmission shaft 202. During the normal operation of the shaft system of the steam turbine generator set 2, one end of the transmission shaft 202 is protected by the oil seal pipe 204 and extends into the brush cover 3, and the shaft system of the steam turbine generator set 2 is connected to the unit support frame 1 through the outer casing 201 and the stabilizing frame 203;

[0031] A tempered transparent cover 301 is hinged on the top of the brush cover 3, and inner brackets 303 are arranged on the inner walls at both ends of the brush cover 3. A sliding column 302 connected to the vibration detection frame 5 is arranged on the top of the inner bracket 303. The bottom of one end of the transmission shaft 202 extends between multiple groups of sliding columns 302, which is located above the multiple groups of inner brackets 303. The inner bracket 303 limits one end of the transmission shaft 202 in the brush cover 3 through the sliding column 302 and cooperates with the vibration detection frame 5.

[0032] A plurality of groups of balls 502 are arranged on the inner wall of the inner arc groove 501, a rod 503 extending to the inside of the water tank 505 is arranged on the top of the balls 502, and a support plate 504 sliding along the inner wall of the water tank 505 is arranged on the top of the rod 503, a water-blocking membrane is arranged on the inner wall of the water tank 505, and a certain amount of colored water is contained in the water tank 505 through the water-blocking membrane. When the balls 502 are in contact with the outer wall of the transmission shaft 202, if the transmission shaft 202 vibrates during operation, a spring member is arranged on the top of the balls 502 to contact with the inner wall of the water tank 505. The arc groove 501 is softly connected, and when the ball 502 is forced to slide upward and sink into the inner groove, it pushes the push rod 503 to slide upward, and the push rod 503 drives the support plate 504 to slide upward along the bottom of the water tank 505, and is reset by the gravity of the color water, so that the color water fluctuates up and down in the water tank 505. The color water at the top of the water tank 505 overflows due to the ups and downs, and flows down along the outer wall of the water tank 505, and is absorbed by the water-absorbing pad 509, which is made of sponge, face and other materials;

[0033] The first airbags 506 are embedded on the inner walls of both sides of the water tank 505, and water-absorbing pads 509 are arranged at the bottom of both sides of the water tank 505. An alarm switch 508 is arranged at the bottom of the water-absorbing pads 509, and a second airbag 507 is arranged around the alarm switch 508. A one-way valve connected to the first airbag 506 is arranged on the side of the second airbag 507. An alarm 510 connected to the alarm switch 508 by wires is arranged on the inner walls of both sides of the vibration detection frame 5. The water-absorbing pads 509 increase in weight after absorbing the colored water and squeeze out the colored water. The alarm switch 508 is pressed and electrically connected to the alarm 510. An alarm sounds and a red light flashes in the alarm 510. The absorbent pad 509 increases in weight and squeezes the second airbag 507. The second airbag 507 transmits the airflow to the first airbag 506 through the one-way valve. The first airbag 506 expands and expands toward the inside of the water tank 505, causing the water-isolating membrane in the water tank 505 to sink inward, so that the colored water remains flush with the overflow boundary at the top of the water tank 505.

[0034] Embodiment 2: A turbine generator shaft vibration test device of this embodiment comprises a paper roll auxiliary box 601 arranged on the side of a paper roll main box 6, a driving motor 604 is arranged at the bottom of the box of the paper roll main box 6, an axis paper display mechanism 4 is arranged on the outer wall of one end of the brush cover 3, and the axis paper display mechanism 4 comprises a paper chute 403 and a disc 404, and a cone pen 406 is arranged inside the disc 404;

[0035] A shaft 602 is provided on the top output end of the driving motor 604, and a paper roll 603 is sleeved on the outer periphery of the shaft 602. A side opening 605 is provided through the end face of the paper roll main box 6. The internal structures of the paper roll main box 6 and the paper roll auxiliary box 601 are the same. When the driving motor 604 in the paper roll main box 6 drives the paper roll 603 to unwind through the shaft 602, the driving motor 604 in the paper roll auxiliary box 601 drives the paper roll 603 to rewind through the shaft 602, thereby realizing the paper roll delivery trajectory and operation process.

[0036] The side inlet 402 and the side outlet 407 are symmetrically arranged on both sides of the paper chute 403. A glass cover 401 is hinged on the outer side of one end of the paper chute 403. The disc 404 is located in the middle of the paper chute 403. The inside of the disc 404 is provided with an active magnetic block 405 connected to the cone pen 406. The side inlet 402 is connected to the upper side opening 605 of the paper roll main box 6, and the side outlet 407 is connected to the upper side opening 605 of the paper roll auxiliary box 601. The paper is put out through the side inlet 402, moves along the inside of the paper chute 403, and is put out through the side outlet 407. The paper roll is transported into the paper roll auxiliary box 601, and the paper roll of the paper roll drum 603 is fixedly unwound three times each time. The paper roll is pulled and laid flat on the outer cross-section of the disk 404. When the transmission shaft 202 of the shaft system of the steam turbine generator set 2 rotates, the transmission shaft 202 is magnetically connected with the movable magnetic block 405 through the magnetic core block 205. The movable magnetic block 405 drives the cone pen 406 to move with the axial rotation and amplitude trajectory of the transmission shaft 202. The cone pen 406 depicts the contacted surface of the paper roll, so the axial operation and amplitude trajectory of the transmission shaft 202 are displayed on the paper.

[0037] In combination with the first embodiment and the second embodiment, the vibration generated during the operation of the transmission shaft 202 can be transmitted to the water tank 505, and the vibration can be used to cause the water in the water tank 505 to overflow. The water-absorbing pad 509 absorbs water and increases weight to trigger the alarm switch 508 and the second air bag 507, so as to realize the wet alarm reminder inside the vibration detection frame 5, and the water weight guide air causes the inner cavity of the water tank 505 to shrink and deform, so as to ensure that the water boundary in the water tank 505 is always within the controllable range of micro-vibration overflow, which is helpful for the real-time vibration detection and alarm reminder of the shaft system of the steam turbine generator set 2, and the magnetic attraction can be used to drive the cone pen 406 to trace the paper arranged on the disk 404 to display the rotation axis point of the transmission shaft 202. Based on this, the alarm 510 and the axis vibration and rotation amplitude trajectory of the shaft system of the steam turbine generator set 2 are combined to perform real-time comparison and understanding, which is helpful to improve the vibration detection accuracy of the shaft system of the steam turbine generator set 2.

[0038] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A steam turbine generator set shaft system vibration test device, comprising a unit support frame (1), characterized in that: A steam turbine generator set (2) is arranged at the top center of the unit support frame (1), brush covers (3) are arranged side by side on the end faces of the steam turbine generator set (2), and a transmission shaft (202) extending into the brush cover (3) is arranged in the middle of the steam turbine generator set (2), a vibration detection frame (5) connected to the transmission shaft (202) is arranged inside the brush cover (3), the vibration detection frame (5) comprises an inner arc groove (501) and a water groove (505), and paper roll main boxes (6) located on the inner wall of the brush cover (3) are symmetrically arranged on both sides of the vibration detection frame (5); A paper roll auxiliary box (601) is arranged on the side of the paper roll main box (6), a driving motor (604) is arranged at the bottom of the box of the paper roll main box (6), an axial paper display mechanism (4) is arranged on the outer wall of one end of the brush cover (3), and the axial paper display mechanism (4) includes a paper chute (403) and a disc (404), and a cone pen (406) is arranged inside the disc (404).

2. A steam turbine generator set shaft system vibration test device according to claim 1, characterized in that: The steam turbine generator set (2) is provided with an outer casing (201) on the outside, a stabilizing frame (203) connected to the set support frame (1) is provided at the bottom of one end of the outer casing (201), an oil seal pipe (204) sleeved with a transmission shaft (202) is provided in the middle of one end of the outer casing (201), and a magnetic core block (205) is embedded in the middle of a cross section of one end of the transmission shaft (202).

3. A steam turbine generator set shaft system vibration test device according to claim 1, characterized in that: A tempered transparent cover (301) is hingedly connected to the top of the brush cover (3), inner brackets (303) are arranged on the inner walls at both ends of the brush cover (3), and a sliding column (302) connected to the vibration detection frame (5) is arranged on the top of the inner bracket (303).

4. A steam turbine generator set shaft system vibration test device according to claim 1, characterized in that: A plurality of groups of balls (502) are arranged on the inner wall of the inner arc groove (501); a support rod (503) extending into the interior of the water tank (505) is arranged on the top of the balls (502); a support plate (504) sliding along the inner wall of the water tank (505) is arranged on the top of the support rod (503); and a water-isolating film is arranged on the inner wall of the water tank (505).

5. A steam turbine generator set shaft system vibration test device according to claim 4, characterized in that: A first airbag (506) is embedded on the inner walls on both sides of the water tank (505), a water-absorbing pad (509) is arranged at the bottom of both sides of the water tank (505), an alarm switch (508) is arranged at the bottom of the water-absorbing pad (509), and a second airbag (507) is arranged around the alarm switch (508), a one-way valve connected to the first airbag (506) is arranged on the side of the second airbag (507), and an alarm (510) connected to the alarm switch (508) by wires is arranged on the inner walls on both sides of the vibration detection frame (5).

6. A steam turbine generator set shaft system vibration test device according to claim 1, characterized in that: A shaft (602) is arranged on the top output end of the driving motor (604), a paper roll (603) is sleeved on the outer periphery of the shaft (602), and a side opening (605) is penetrated through the end face of the paper roll main box (6).

7. A steam turbine generator set shaft system vibration test device according to claim 1, characterized in that: The paper chute (403) is symmetrically provided with a side inlet (402) and a side outlet (407), one end of the paper chute (403) is hingedly connected to the outside with a glass cover (401), the disc (404) is located in the middle of the paper chute (403), and the inside of the disc (404) is provided with a movable magnetic block (405) connected with the cone pen (406).

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