An automatic adjusting push rod device for installing a power plant generator set

Abstract

The present invention provides an automatic adjusting push rod device for the installation of power plant generator sets, which is used to quickly adjust the coaxiality in the height direction and the horizontal direction, ensure the rapid coaxial alignment of the axis of the turbine shaft and the generator shaft, and the displacement occurring during the installation and operation of the unit can be adjusted in real time. It includes: a turbine shaft, a generator shaft, a generator body, and a generator base; the output end of the generator body is provided with a generator shaft, and the generator shaft is connected to the turbine shaft through a coupling; the generator body is supported on the upper surface of the generator base, and a plurality of pairs of adjusting push rod assemblies are respectively provided on both sides of the length direction of the upper surface of the generator base, and the male rod heads of each pair of the adjusting push rod assemblies are arranged facing each other and facing the corresponding side of the generator body, and the corresponding sides of the generator body are respectively provided with female rod heads, and the male rod heads of the adjusting push rod assemblies are correspondingly inserted into the inner concave positioning cavity of the female rod head.

Description

Technical Field

[0001] The invention relates to the technical field of coaxial centering, in particular to an automatic regulating mandrel device for installing a generator set in a power plant. Background Art

[0002] The steam turbine generator set is a key equipment in the power plant. During the installation of this equipment, it is an important step to align the coupling of the steam turbine generator set to ensure that the steam turbine and the generator are in a coaxial position. When the coaxiality deviation between the turbine shaft and the generator shaft centerline exceeds the standard, it will cause abnormal vibration; the quality of the concentricity alignment will directly affect the working performance and service life of the steam turbine generator set. The existing adjustment method is to find the center of the generator rotor based on the center of the steam turbine rotor, so that the generator shaft center and the turbine shaft center are connected in a straight line. The specific method is to install special tools and dial indicators in the axial and radial positions for measurement, and then adjust the generator bolts manually for adjustment. After multiple adjustments, the coaxiality of the steam turbine and the generator meets the requirements of the drawings and specifications.

[0003] Disadvantages of this method: 1. The implementation method relies entirely on manpower, and different people's operations will cause errors and insufficient accuracy;

[0004] 2. It can only be adjusted when the unit is installed. After installation, it cannot be adjusted if displacement occurs during operation. Summary of the invention

[0005] In response to the above problems, the present invention provides an automatic adjusting push rod device for installing a power plant generator set, which is used to quickly adjust the coaxiality in the height direction and the horizontal direction to ensure that the axes of the turbine shaft and the generator shaft are quickly coaxially aligned, and the displacement occurring during the installation and operation of the unit can be adjusted in real time.

[0006] An automatic adjusting mandrel device for installing a power plant generator set, characterized in that it comprises:

[0007] Steam turbine shaft;

[0008] Generator shaft;

[0009] Generator body;

[0010] Generator base;

[0011] The output end of the generator body is provided with a generator shaft, and the generator shaft is connected to the turbine shaft through a coupling;

[0012] The generator body is supported on the upper surface of the generator base, and a plurality of pairs of adjusting mandrel assemblies are respectively arranged on both sides of the upper surface of the generator base in the length direction, and the male rod heads of each pair of the adjusting mandrel assemblies are arranged facing each other and toward the corresponding side of the generator body, and the corresponding sides of the generator body are respectively provided with female rod heads, and the male rod heads of the adjusting mandrel assemblies are correspondingly inserted into the inner concave positioning cavity of the female rod heads;

[0013] The lower surface of the generator base is provided with a plurality of downward convex female rod heads, and a plurality of upward convex adjusting mandrel assemblies are arranged in the concrete surface area supported by the generator base, the adjusting mandrel assemblies and the female rod heads are arranged one by one, and the male rod heads of the adjusting mandrel assemblies are correspondingly inserted into the concave positioning cavities of the female rod heads;

[0014] The rod end of the adjusting mandrel assembly is threadedly connected to a fixed support, the inner side of the rod end of the adjusting mandrel is connected to the output end of the motor, and the signal input end of the motor is connected to a controller;

[0015] Each adjusting push rod assembly is also provided with a force measuring device, the force measuring device is attached to the corresponding surface of the object to be adjusted, and the force measuring device is externally connected to a controller.

[0016] It is further characterized by:

[0017] At least two rows of adjustable mandrel assemblies are arranged below the bottom of the front and rear positions of the generator base, which ensure sufficient supporting force for the generator body and the generator base;

[0018] The adjusting push rod assembly specifically includes a fixed support, an adjusting rod, a motor support, and a motor. The fixed support is provided with a motor support, the motor is fixedly provided on the motor support, the output end of the motor is connected with a driving gear, the end plate of the fixed support facing the female rod head is provided with a threaded guide hole, the adjusting rod is integrated with threads, the outer end of the adjusting rod is a male rod head, the inner end rod portion of the adjusting rod is threadedly connected to the threaded guide hole, the inner end rod portion of the adjusting rod is fixedly provided with a driven gear, the thickness of the driven gear is greater than the driving gear, the driving gear is meshed and connected with the driven gear, and the controller drives the motor to rotate and is used to adjust the male rod head to drive the female rod head to move;

[0019] The male club head is specifically a spherical structure, and the inner concave positioning cavity of the female club head is an inner concave spherical cavity, which ensures a larger contact surface and does not generate torque during the relative movement process;

[0020] The fixing support is integrated with fixing bolts, and the fixing bolts are used to fix to the concrete floor or the generator base;

[0021] The inner cavity of the adjusting top rod assembly is also provided with a distance measuring element, and the distance measuring element is arranged toward the inner wall of the end plate. If the adjusting top rod assembly cannot bear the weight of the generator or is displaced horizontally and is deformed, the distance measuring element measures the change in the distance between it and the inner wall of the end plate. By measuring this distance value, the deformation of the adjusting top rod assembly can be observed in real time.

[0022] After adopting the above technical solution, the pressure of the generator base or the generator is first measured by a force measuring device, and the pressure value is transmitted to the controller through an electrical signal. The fluctuation curve can be obtained. The controller calculation can be used to obtain the direction of the generator offset at this point, and then the motor operation is controlled so that the male rod head drives the female rod head to move in a straight line, thereby completing the displacement adjustment of the motor base or the generator. In this process, the entire turning does not stop, and the value fluctuation of the force measuring device can be detected to be reduced at the same time. When the fluctuation is reduced to a reasonable range, the adjustment is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main view structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0025] Figure 3 for Figure 1 A local enlarged structural schematic diagram;

[0026] The names corresponding to the serial numbers in the figure are as follows:

[0027] Steam turbine shaft 10, generator shaft 20, generator body 30, generator base 40, coupling 50, adjusting push rod assembly 60, male rod head 61, fixed support 62, end plate 621, distance measuring element 622, motor 63, force measuring device 64, force measuring head 641, adjusting rod 65, motor support 66, driving gear 67, driven gear 68, fixing bolt 69, female rod head 70, concave positioning cavity 71, controller 80. DETAILED DESCRIPTION

[0028] An automatic adjusting push rod device for installing a power plant generator set, see Figure 1-Figure 3 , which includes a steam turbine shaft 10, a generator shaft 20, a generator body 30, and a generator base 40;

[0029] The output end of the generator body 30 is provided with a generator shaft 20, and the generator shaft 20 is connected to the turbine shaft 10 through a coupling 50;

[0030] The generator body 30 is supported on the upper surface of the generator base 40. A plurality of pairs of adjusting mandrel assemblies 60 are respectively arranged on both sides of the length direction of the upper surface of the generator base 40. The male rod heads 61 of each pair of adjusting mandrel assemblies 60 are arranged facing each other and facing the corresponding side of the generator body 30. The corresponding sides of the generator body 30 are respectively provided with female rod heads 70. The male rod heads 61 of the adjusting mandrel assemblies 60 are correspondingly inserted into the concave positioning cavities 71 of the female rod heads 70.

[0031] The lower surface of the generator base 40 is provided with a plurality of downward convex female rod heads 70, and a plurality of upward convex adjusting mandrel assemblies 60 are arranged in the concrete surface area supported by the generator base 40. The adjusting mandrel assemblies 60 and the female rod heads 70 are arranged one by one correspondingly, and the male rod heads 61 of the adjusting mandrel assemblies 60 are correspondingly inserted into the concave positioning cavities 71 of the female rod heads 70;

[0032] The rod end of the adjusting push rod assembly 60 is threadedly connected to the fixed support 62, the inner side of the rod end of the adjusting push rod assembly is connected to the output end of the motor 63, and the signal input end of the motor 63 is connected to the controller 80;

[0033] Each adjusting push rod assembly 60 is also provided with a force measuring device 64 , a force measuring head 641 of the force measuring device 64 is in contact with the corresponding surface of the object to be adjusted, and the force measuring device 64 is externally connected to a controller 80 .

[0034] At least two rows of adjustable mandrel assemblies 60 are arranged below the bottom of the front and rear positions of the generator base 40, which ensure sufficient support force for the generator body and the generator base;

[0035] The adjusting push rod assembly 60 specifically includes a fixed support 62, an adjusting rod 65, a motor support 66, and a motor 63. The motor support 66 is arranged in the fixed support 62, and the motor 63 is fixedly arranged on the motor support 66. The output end of the motor 63 is connected with a driving gear 67. The end plate 621 of the fixed support 62 facing the female rod head 70 is provided with a threaded guide hole. The adjusting rod 65 is integrated with threads. The outer end of the adjusting rod 65 is a male rod head 61. The inner end rod portion of the adjusting rod 65 is threadedly connected to the threaded guide hole. The inner end rod portion of the adjusting rod 65 is fixed with a driven gear 68. The thickness of the driven gear 68 is greater than that of the driving gear 67. The driving gear 67 is meshed and connected with the driven gear 68. The controller 80 drives the motor 63 to rotate, which is used to adjust the male rod head 61 to drive the female rod head 70 to move.

[0036] The male club head 61 is specifically a spherical structure, and the concave positioning cavity 71 of the female club head 70 is a concave spherical cavity, which ensures a larger contact surface and does not generate torque during the relative movement process;

[0037] The fixing support 62 is integrated with fixing bolts 69, and the fixing bolts 69 are used to fix to the concrete ground or the generator base 40;

[0038] The inner cavity of the fixed support 62 is also provided with a distance measuring element 622, and the distance measuring element 622 is arranged toward the inner wall of the end plate 621. If the adjusting top rod assembly 60 cannot bear the weight of the generator body or the generator body is displaced in the horizontal direction and deformed, the distance measuring element 622 measures the change in the distance between it and the inner wall of the end plate 621. By measuring this distance value, the deformation of the adjusting top rod assembly can be observed in real time.

[0039] During specific implementation: a pair of adjusting top rod assemblies 60 are respectively provided at the front and rear parts of the length direction of the upper surface of the generator base 40, two pairs of upward convex adjusting top rod assemblies 60 are arranged in the concrete surface area supported by the generator base 40, and a total of 8 adjusting top rod assemblies 60 are provided in the entire structure. Four downward convex female rod heads 70 are configured at the bottom of the generator base 40, and corresponding four side convex female rod heads 70 are fixedly provided on the corresponding sides of the generator body 30.

[0040] The adjusting mandrel assembly 60 fixed to the concrete is used to adjust the height concentricity of the generator shaft 20 , and the adjusting mandrel assembly 60 fixed to the generator base 40 is used to adjust the horizontal concentricity of the generator shaft 20 in pairs synchronously and in the same direction.

[0041] Its working principle is as follows: first, the pressure of the generator base or the generator on the side is measured by a force measuring device, and the pressure value is transmitted to the controller through an electrical signal to obtain a fluctuation curve. The controller calculates the direction of the generator offset at this point, and then controls the motor to make the male rod head drive the female rod head to move in a straight line, thereby completing the displacement adjustment of the motor base or the generator. In this process, the entire turning does not stop, and the value fluctuation of the force measuring device can be detected to decrease at the same time. When the fluctuation is reduced to a reasonable range, the adjustment is completed.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic adjusting mandrel device for installing a power plant generator set, characterized in that: It includes: Steam turbine shaft; Generator shaft; Generator body; Generator base; The output end of the generator body is provided with a generator shaft, and the generator shaft is connected to the turbine shaft through a coupling; The generator body is supported on the upper surface of the generator base, and a plurality of pairs of adjusting mandrel assemblies are respectively arranged on both sides of the upper surface of the generator base in the length direction, and the male rod heads of each pair of the adjusting mandrel assemblies are arranged facing each other and toward the corresponding side of the generator body, and the corresponding sides of the generator body are respectively provided with female rod heads, and the male rod heads of the adjusting mandrel assemblies are correspondingly inserted into the inner concave positioning cavity of the female rod heads; The lower surface of the generator base is provided with a plurality of downward convex female rod heads, and a plurality of upward convex adjusting mandrel assemblies are arranged in the concrete surface area supported by the generator base, the adjusting mandrel assemblies and the female rod heads are arranged one by one, and the male rod heads of the adjusting mandrel assemblies are correspondingly inserted into the concave positioning cavities of the female rod heads; The rod end of each adjusting push rod assembly is threadedly connected to a fixed support, the inner side of the rod end of the adjusting push rod assembly is connected to the output end of the motor, and the signal input end of the motor is connected to the controller; Each adjusting push rod assembly is also provided with a force measuring device, the force measuring head of the force measuring device is in contact with the corresponding surface of the object to be adjusted, and the force measuring device is externally connected to a controller; At least two rows of adjusting mandrel assemblies are arranged below the bottom of the front and rear positions of the generator base; The male club head is specifically a spherical structure, and the inner concave positioning cavity of the female club head is an inner concave spherical cavity.

2. The automatic adjusting push rod device for installing a power plant generator set according to claim 1, characterized in that: The adjusting push rod assembly specifically includes a fixed support, an adjusting rod, a motor support, and a motor. The fixed support is provided with a motor support, the motor is fixedly provided on the motor support, the output end of the motor is connected with a driving gear, the end plate of the fixed support facing the female rod head is provided with a threaded guide hole, the adjusting rod is integrated with threads, the outer end of the adjusting rod is a male rod head, the inner end rod portion of the adjusting rod is threadedly connected to the threaded guide hole, the inner end rod portion of the adjusting rod is fixedly provided with a driven gear, the thickness of the driven gear is greater than that of the driving gear, and the driving gear is meshed and connected with the driven gear.

3. The automatic adjusting mandrel device for installing a power plant generator set according to claim 2, characterized in that: The fixing support is integrated with fixing bolts, and the fixing bolts are used to fix to the concrete floor or the generator base.

4. The automatic adjusting mandrel device for installing a power plant generator set according to claim 2, characterized in that: The inner cavity of the adjusting push rod assembly is also provided with a distance measuring element, and the distance measuring element is arranged toward the inner wall of the end plate.

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