A steam turbine shaft centering device

Abstract

The present invention relates to the technical field of shaft system centering and measuring equipment, and in particular to a turbine shaft system centering device, comprising: a bracket body, the bracket body is provided with a socket, the socket is used to allow the shaft system to pass through the bracket body; a fixing component, the fixing component is used to clamp and fix the bracket body; a detection component, the detection component comprises a detection mechanism 1, a rotation mechanism, a position adjustment mechanism and a detection mechanism 2; an adjustment component, the adjustment component is used to adjust the position of the shaft system according to the detection result of the detection component; the present application can continuously center the shaft system from different angles and at different positions of the shaft system, can quickly and comprehensively detect the shaft system during the inspection or installation of the turbine, and can adjust the position of the shaft system through the adjustment component, and at the same time, through automated multi-point centering, it can reduce the mistakes and errors of human detection and adjustment, and improve the consistency and reliability of calibration.

Description

Technical Field

[0001] The invention relates to the technical field of shaft system centering measurement equipment, in particular to a turbine shaft system centering device. Background Art

[0002] At present, the turbine shaft and the coupling are connected by a flanged short pipe, and rigid springs are installed on both sides of the short pipe flange. When the centrifugal pump coupling is overhauled, the connecting short pipe must be removed. After the overhaul, before the connecting short pipe is installed, the coupling and the turbine shaft must be centered. After the centering is completed, the flanged short pipe between the turbine shaft and the coupling can be installed. If the centering is not performed, the circumferential clearance of the shaft system will be uneven, which will cause a large amount of air leakage when the turbine is running.

[0003] At present, the center of the shaft system is generally measured manually using a dial indicator. During the measurement, the position of the dial indicator needs to be constantly adjusted to detect the position of the shaft system at different angles. The whole process takes a lot of time, resulting in a long maintenance time for the turbine. Summary of the invention

[0004] The object of the present invention is to provide a turbine shaft centering device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A steam turbine shaft centering device, comprising:

[0007] A support body, wherein the support body is provided with an insertion hole, and the insertion hole is used for the shaft system to pass through the support body;

[0008] A fixing assembly, the fixing assembly is used to clamp and fix the bracket body;

[0009] A detection assembly, the detection assembly comprising a detection mechanism 1, a rotation mechanism, a position adjustment mechanism and a detection mechanism 2, the rotation mechanism is used to drive the detection mechanism 1 to rotate so as to dynamically monitor the shaft system, the position adjustment mechanism is used to adjust the detection position of the detection mechanism 2, and the detection mechanism 2 is used to detect the position of the shaft system along the axial direction; and

[0010] An adjustment component is used to adjust the position of the shaft system according to the detection result of the detection component.

[0011] Preferably, the bracket body is provided with a transmission cavity, and the fixed component includes a driving motor, an internal gear, a transmission gear, a transmission rack and a clamping rod, the driving motor is used to drive the internal gear to rotate, the internal gear is arranged in the transmission cavity, the internal gear and the transmission gear are meshed with each other, the transmission rack and the transmission gear are meshed with each other, the clamping rod is fixedly connected to the transmission rack, and the clamping rod is slidably connected to the bracket body, and the internal gear is used to drive the transmission gear to rotate by rotating the transmission rack, and the clamping rod is driven to move along the radial direction of the bracket body through the transmission of the transmission rack, and a plurality of the transmission gears, the transmission racks and the clamping rods are arranged, and a plurality of the transmission gears, the transmission racks and the clamping rods are arranged around the bracket body.

[0012] Preferably, the bracket body is provided with a gear groove 1, and the rotating mechanism includes a mounting block, a moving motor and a moving gear. The moving motor is arranged inside the mounting block and is used to drive the moving gear to rotate. The moving gear and the gear groove 1 are meshed with each other. The moving motor drives the moving gear to rotate to drive the mounting block to rotate along the gear groove 1. The detection mechanism 1 is arranged on the mounting block.

[0013] Preferably, the detection mechanism 1 includes a laser displacement sensor 1, which is arranged on the mounting block and is used to dynamically detect the position of the shaft system.

[0014] Preferably, the bracket body is provided with an installation groove, and the position adjustment mechanism includes a moving push rod, a rotating motor and a moving ring. There are several moving push rods, and the rotating motor is arranged at the moving end of one of the moving push rods. The moving ends of the other moving push rods are all provided with limiting blocks. The moving ring is provided with a second gear groove, and the output gear of the rotating motor is arranged in the second gear groove. The limiting block is also arranged in the second gear groove. The output gear is driven to rotate by the rotating motor to drive the moving ring to rotate.

[0015] Preferably, four movable push rods are provided, and the four movable push rods are arranged circumferentially around the installation groove.

[0016] Preferably, the second detection mechanism includes a torsion spring, a rotating block and a second laser displacement sensor, the rotating block is connected to the moving ring, the torsion spring is arranged at the hinged end of the rotating block, and the second laser displacement sensor is arranged at the non-hinged end of the rotating block and is used to detect the position of the shaft system along the axial direction.

[0017] Preferably, the adjustment assembly includes a hydraulic push rod and a clamping block, the hydraulic push rod is arranged on the bracket body, and the clamping block is arranged inside the socket, and the hydraulic push rod is controlled to be extended and retracted to drive the clamping block to adjust the position of the shaft system.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: after the present invention fixes the bracket body through the fixing component, the rotating mechanism drives the detection mechanism one to center the shaft inside the bracket body at different angles, and the position adjustment mechanism drives the detection mechanism two to perform position detection at different angles on different positions of the shaft along the axial direction of the shaft. The present application can continuously center the shaft system from different angles and at different positions of the shaft system, can perform rapid and comprehensive detection of the shaft system during the inspection or installation of the turbine, and can adjust the position of the shaft system by adjusting the component. At the same time, through automated multi-point centering, the mistakes and errors of human detection and adjustment can be reduced, and the consistency and reliability of calibration can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The axial structure of the present invention is schematically shown Figure 1 (The moving push rod is not extended);

[0020] Figure 2 It is a schematic diagram of the rear axial view of the structure of the present invention;

[0021] Figure 3 The axial structure of the present invention is schematically shown Figure 2 (Moving push rod extended state);

[0022] Figure 4 This is a schematic diagram of the connection structure between the movable push rod and the limit block of the present invention;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the transmission cavity of the present invention;

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the movable ring of the present invention;

[0025] Figure 7 This is a schematic diagram of the shaft structure of the mounting block of the present invention;

[0026] Figure 8 This is a schematic diagram of the cross-sectional structure of the mounting block of the present invention.

[0027] In the figure: 1 bracket body, 2 jack, 3 transmission cavity, 4 drive motor, 5 internal gear, 6 transmission gear, 7 transmission rack, 8 clamping rod, 9 mounting block, 10 moving motor, 11 moving gear, 12 laser displacement sensor 1, 13 moving push rod, 14 rotating motor, 15 moving ring, 16 limit block, 17 torsion spring, 18 rotating block, 19 laser displacement sensor 2, 20 hydraulic push rod, 21 clamping block, 101 gear slot 1, 102 mounting slot, 1501 gear slot 2. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-8 , the present invention provides a technical solution:

[0030] A steam turbine shaft centering device, as shown in the attached manual Figure 1 As shown, including:

[0031] Bracket body 1, as shown in the instruction manual Figure 1 As shown, the bracket body 1 is an annular structure, and the bracket body 1 is provided with a plug hole 2, and the plug hole 2 is used to allow the shaft system to pass through the bracket body 1;

[0032] A fixing component, which is used to clamp and fix the bracket body 1;

[0033] A detection assembly, the detection assembly includes a detection mechanism 1, a rotation mechanism, a position adjustment mechanism and a detection mechanism 2, the rotation mechanism is used to drive the detection mechanism 1 to rotate so as to dynamically monitor the shaft system, the position adjustment mechanism is used to adjust the detection position of the detection mechanism 2, and the detection mechanism 2 is used to detect the position of the shaft system along the axial direction; and

[0034] The adjustment component is used to adjust the position of the shaft system according to the detection result of the detection component.

[0035] The bracket body 1 is provided with a transmission cavity 3, and the transmission cavity 3 is used to install a fixed component. The fixed component includes a driving motor 4, an internal gear 5, a transmission gear 6, a transmission rack 7 and a clamping rod 8. The driving motor 4 is a servo motor and can therefore achieve more precise position control. The driving motor 4 is used to drive the internal gear 5 to rotate. The internal gear is arranged in the transmission cavity 3. The internal gear 5 and the transmission gear 6 are meshed with each other. The transmission rack 7 and the transmission gear 6 are meshed with each other. The clamping rod 8 is fixedly connected to the transmission rack 7. Therefore, when the transmission rack 7 slides, the clamping rod 8 is driven to extend and retract, and then the bracket body 1 is clamped. When clamping, the clamping block will abut against the inner wall of the mounting hole of the shaft. The clamping rod 8 is slidably connected to the bracket body 1. By rotating the internal gear 5, the transmission gear 6 is driven to rotate, and the transmission of the transmission rack 7 drives the clamping rod 8 to move along the radial direction of the bracket body 1. In this embodiment, there are six transmission gears 6, transmission racks 7 and clamping rods 8, and six transmission gears 6, transmission racks 7 and clamping rods 8 are arranged around the bracket body 1.

[0036] The bracket body 1 is provided with a gear groove 101, which is used to limit the movement of the mobile gear 11 and cooperate with the mobile gear 11 so that the mobile gear 11 can move along the gear groove 101 and thus control the moving trajectory of the mounting block 9. The rotating mechanism includes the mounting block 9, a mobile motor 10 and a mobile gear 11. The mobile motor 10 is arranged inside the mounting block 9 and is used to drive the mobile gear 11 to rotate. The mobile gear 11 and the gear groove 101 are meshed with each other. The mobile motor 10 drives the mobile gear 11 to rotate to drive the mounting block 9 to rotate along the gear groove 101. The detection mechanism is arranged on the mounting block 9.

[0037] The detection mechanism 1 includes a laser displacement sensor 12, which is arranged on the mounting block 9 and is used to dynamically detect the position of the shaft system. In this embodiment, the laser displacement sensor 12 and the laser displacement sensor 2 19 are both LK-G5000 series high-precision CMOS laser displacement sensors. In actual use, the models of the laser displacement sensor 12 and the laser displacement sensor 2 19 can be reasonably selected according to actual conditions.

[0038] The bracket body 1 is provided with a mounting groove 102, which is used to install the moving push rod 13 and store the moving ring 15 when not in use. The position adjustment mechanism includes the moving push rod 13, the rotating motor 14 and the moving ring 15. The rotating motor 14 is arranged at the moving end of one of the moving push rods 13, and the moving ends of the other moving push rods 13 are all provided with limit blocks 16. The limit blocks 16 are used to limit the movement of the moving ring 15 so that it remains stable and does not shake during rotation. The moving ring 15 is provided with a second gear groove 1501, which is used to cooperate with the output gear of the rotating motor 14 so as to drive the moving ring 15 to rotate when the rotating motor 14 drives the output gear to rotate. The output gear of the rotating motor 14 is arranged in the second gear groove 1501, and the limit block 16 is also arranged in the second gear groove 1501. In the drawings of the specification, the output gear of the rotating motor 14 is used to represent the rotating motor 14. It is hereby explained that the rotating motor 14 drives the output gear to rotate to drive the moving ring 15 to rotate. In this embodiment, four moving push rods 13 are provided, and the four moving push rods 13 are circumferentially arranged in the installation groove 102 .

[0039] The second detection mechanism includes a torsion spring 17, a rotating block 18 and a laser displacement sensor 19. The rotating block 18 is connected to the moving ring 15. The torsion spring 17 is arranged at the hinged end of the rotating block 18. The torsion spring 17 is used to drive the rotating block 18 to rotate when the moving push rod 13 drives the moving ring 15 to move to the outside of the installation groove 102 and to set the rotating block 18 along the radial direction of the moving ring 15. The laser displacement sensor 19 is arranged at the non-hinged end of the rotating block 18 and is used to detect the position of the shaft system along the axial direction. Through the setting of the torsion spring 17, when the moving ring 15 is in the installation groove 102, the laser displacement sensor 19 detects the obstruction in the moving direction of the moving push rod 13 and then determines the moving distance of the moving push rod 13.

[0040] The adjustment component includes a hydraulic push rod 20 and a clamping block 21. The hydraulic push rod 20 is externally connected to a driving oil pump. The driving oil pump is connected to the hydraulic push rod 20 through a pipeline and is used to drive the hydraulic push rod 20 to move. Four hydraulic push rods 20 are arranged around the inside of the bracket body 1. By controlling the travel distance of the hydraulic push rod 20, the clamping block 21 can be controlled to adjust the position of the shaft at different positions and directions. The clamping block 21 is arranged inside the socket 2. By controlling the driving oil pump to drive the hydraulic push rod 20 to extend and retract, it is used to drive the clamping block 21 to clamp and adjust the shaft system.

[0041] Working principle: When in use, the bracket body 1 is passed through the shaft to be measured through the socket 2, and then the internal gear 5 is driven to rotate by controlling the driving motor 4. When the internal gear 5 rotates, it will drive the transmission gear 6 to rotate, and then the bracket body 1 is coaxially fixed to the mounting hole of the shaft through the clamping rod 8. At this time, starting the moving motor 10 can drive the laser displacement sensor 12 to detect the position of the shaft. While the laser displacement sensor 12 is detecting, the moving push rod 13 will drive the moving ring 15 to move and the rotating motor 14 will be started, thereby driving the laser displacement sensor 2 19 to detect different positions of the shaft. Then, according to the detection results of the laser displacement sensor 12 and the laser displacement sensor 2 19, the driving oil pump is started to drive the hydraulic push rod 20 to move the clamping block 21 and then adjust the position of the shaft system.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steam turbine shaft centering device, characterized in that: include: A support body, wherein the support body is provided with an insertion hole, and the insertion hole is used for the shaft system to pass through the support body; A fixing assembly, the fixing assembly is used to clamp and fix the bracket body; A detection assembly, the detection assembly comprising a detection mechanism 1, a rotation mechanism, a position adjustment mechanism and a detection mechanism 2, the rotation mechanism is used to drive the detection mechanism 1 to rotate so as to dynamically monitor the shaft system, the position adjustment mechanism is used to adjust the detection position of the detection mechanism 2, and the detection mechanism 2 is used to detect the position of the shaft system along the axial direction; An adjustment component, the adjustment component is used to adjust the position of the shaft system according to the detection result of the detection component; The bracket body is provided with a transmission cavity, and the fixed assembly includes a driving motor, an internal gear, a transmission gear, a transmission rack and a clamping rod, the driving motor is used to drive the internal gear to rotate, the internal gear is arranged in the transmission cavity, the internal gear and the transmission gear are meshed with each other, the transmission rack and the transmission gear are meshed with each other, the clamping rod is fixedly connected to the transmission rack, and the clamping rod is slidably connected to the bracket body, and the transmission gear is driven to rotate by rotating the internal gear, and the clamping rod is driven to move along the radial direction of the bracket body through the transmission of the transmission rack, and the transmission gear, the transmission rack and the clamping rod are each provided with a plurality of them, and the plurality of transmission gears, the transmission rack and the clamping rod are arranged around the bracket body; The bracket body is provided with a gear groove 1, the rotating mechanism includes a mounting block, a moving motor and a moving gear, the moving motor is arranged inside the mounting block and is used to drive the moving gear to rotate, the moving gear and the gear groove 1 are meshed with each other, and the moving motor drives the moving gear to rotate to drive the mounting block to rotate along the gear groove 1, and the detection mechanism 1 is arranged on the mounting block; The bracket body is provided with a mounting groove, and the position adjustment mechanism includes a moving push rod, a rotating motor and a moving ring. The moving push rods are provided with a plurality of them, and the rotating motor is provided at the moving end of one of the moving push rods, and the moving ends of the other moving push rods are provided with limit blocks. The moving ring is provided with a second gear groove, and the output gear of the rotating motor is provided in the second gear groove, and the limit block is also provided in the second gear groove. The output gear is driven to rotate by the rotating motor to drive the moving ring to rotate; The adjustment assembly includes a hydraulic push rod and a clamping block. The hydraulic push rod is arranged on the bracket body, and the clamping block is arranged inside the socket. The hydraulic push rod is controlled to extend and retract to drive the clamping block to adjust the position of the shaft system.

2. A steam turbine shaft centering device according to claim 1, characterized in that: The detection mechanism 1 includes a laser displacement sensor 1, which is arranged on the mounting block and is used to dynamically detect the position of the shaft system.

3. The steam turbine shaft centering device according to claim 1, characterized in that: The movable push rods are provided with four, and the four movable push rods are arranged around the circumference of the installation groove.

4. The steam turbine shaft centering device according to claim 1, characterized in that: The second detection mechanism includes a torsion spring, a rotating block and a second laser displacement sensor. The rotating block is connected to the moving ring, the torsion spring is arranged at the hinged end of the rotating block, and the second laser displacement sensor is arranged at the non-hinged end of the rotating block and is used to detect the position of the shaft system along the axial direction.

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