Dynamic balance detection device for rotating shaft of steam turbine

Abstract

The utility model discloses a steam turbine rotating shaft dynamic balance detection device comprising a pedestal, the pedestal is provided with a detection host, a plurality of support frames, a plurality of sensors and a tail end support, the steam turbine rotating shaft is rotatably connected between the detection host and the tail end support, the support frames are rotatably connected with support wheels, and the support wheels are rotatably connected with the sensors. The supporting wheels make contact with the lower portion of a steam turbine rotating shaft, the sensor is located above or below the rotating shaft, a portal frame is arranged on the base, an installation mechanical arm is arranged on the portal frame, a containing disc is arranged on the base, and a plurality of dynamic balance blocks are arranged in the containing disc. The portal frame, the supporting frame and the tail end support are all in sliding connection with the base, automatic dynamic balance adjustment is achieved through the portal frame and the mechanical arm installed on the portal frame, and efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of detection equipment more particularly relates to a steam turbine rotating shaft dynamic balance detection device. BACKGROUND

[0002] At present, in order to ensure the rotation precision of steam turbine rotating shaft, counterweight structure (the position set according to different structure, power steam turbine is also different) is arranged on its surface, and before the assembly of rotating shaft, the processed rotating shaft needs to be placed on the detection device to carry out dynamic balance detection, generally installs dynamic balance block (counterweight block) on the counterweight structure after detection once, until the dynamic balance design requirement is satisfied.

[0003] But at present, after detection of detection device, only dynamic balance block installation position and dynamic balance block installation weight can be marked, and dynamic balance block needs to be installed and disassembled manually, and the efficiency is low, and there is great inaccuracy in installation, leading to the reduction of whole detection efficiency. UTILITY MODEL CONTENTS

[0004] In view of the deficiency of prior art, the utility model provides a steam turbine rotating shaft dynamic balance detection device, can automatically carry out dynamic balance adjustment to steam turbine rotating shaft, and the efficiency is high.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a steam turbine rotating shaft dynamic balance detection device, including base, the base is provided with detection host, a plurality of support frames, a plurality of sensors and end support, the steam turbine rotating shaft is rotatably connected between detection host and end support, the support frame is rotatably connected with support wheel, the support wheel is contacted in the below of steam turbine rotating shaft, the sensor is located in the above or below of rotating shaft, the base is provided with gantry, the gantry is provided with installation mechanical hand, the base is provided with placing tray, the placing tray is provided with a plurality of dynamic balance blocks, the gantry, support frame and end support are all with base sliding connection.

[0006] Further, the installation mechanical hand includes translational support, lifting support, pneumatic clamping jaw and electric screwdriver, the translational support is slidingly connected with gantry, the lifting support is liftingly connected with translational support, the pneumatic clamping jaw is liftingly connected on lifting support, and the electric screwdriver is located on lifting support.

[0007] Further, the installation mechanical hand is provided with a camera.

[0008] Further, the placing tray is provided with a plurality of placing holes, the dynamic balance block is placed in the placing hole, and the both sides of the placing hole are provided with air avoidance groove.

[0009] Further, the detection host is provided with a driving motor, the driving motor is connected with the steam turbine rotating shaft, and a plurality of sensors are arranged between the driving motor and the steam turbine rotating shaft.

[0010] Compared with the prior art, the steam turbine rotating shaft is connected with the detection host and the end support, is supported by the supporting wheels on the support frame, and then the driving motor in the detection host drives the steam turbine rotating shaft to rotate, the dynamic balance of the steam turbine rotating shaft during rotation is detected, calculation and analysis are carried out, the steam turbine rotating shaft is stopped, the dynamic balance block of the corresponding weight is grabbed by the gantry and the mounting manipulator, and is installed on the corresponding position of the counterweight structure of the steam turbine rotating shaft, and then the steam turbine rotating shaft is rotated again for detection until the dynamic balance reaches the requirement, the dynamic balance adjustment is realized automatically by the gantry and the mounting manipulator on the gantry, and the efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of the steam turbine rotating shaft dynamic balance detection device of the utility model;

[0012] Figure 2 It is a structural schematic view of the mounting manipulator on the gantry in the steam turbine rotating shaft dynamic balance detection device of the utility model.

[0013] The drawings are as follows: base 1, detection host 2, support frame 3, sensor 4, end support 5, steam turbine rotating shaft 6, supporting wheel 7, gantry 8, placing disc 9, translation support 10, lifting support 11, pneumatic clamping jaw 12, electric screwdriver 13 and lifting cylinder 14. DETAILED DESCRIPTION

[0014] In the description of the utility model, it should be explained that for the orientation words, if the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, and cannot be understood as limiting the specific protection scope of the utility model.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0016] Reference Figure 1 and Figure 2 The present invention will be further described below.

[0017] A turbine shaft dynamic balancing testing device includes a base 1, on which a testing host 2, several support frames 3, several sensors 4, and an end bracket 5 are mounted. The turbine shaft 6 is rotatably connected between the testing host 2 and the end bracket 5. Support wheels 7 are rotatably connected to the support frames 3 and contact the lower part of the turbine shaft 6. The sensors 4 are located above or below the shaft. A gantry frame 8 is mounted on the base 1, and an installation robot arm is mounted on the gantry frame 8. A placement plate 9 is mounted on the base 1, and several dynamic balancing blocks are placed inside the placement plate 9. The gantry frame 8, support frames 3, and end bracket 5 are all slidably connected to the base 1.

[0018] Specifically, the end bracket 5 is slidably connected to the base 1, the support frame 3 is slidably connected to the base 1, and the structure for driving the end bracket 5 and the support frame 3 can be a lead screw and lead nut. The sensor 4 on the base 1 can be connected to the bracket, and the bracket and the base 1 can be slidably connected or other connection methods that can change the position of the sensor 4.

[0019] Specifically, the sensor 4 can also be placed on both sides or above the turbine shaft 6 or in other positions around the circumference. This can be changed by a bracket, such as a liftable bracket with a horizontally movable crossbar on it, and the sensor 4 is connected to the crossbar.

[0020] Specifically, if the turbine shaft 6 being tested has a bearing, the support wheel 7 on the support frame 3 is removed, and the bearing is placed and fixed on the support frame 3.

[0021] like Figure 1 As shown in the preferred embodiment, the installation robot includes a translation bracket 10, a lifting bracket 11, a pneumatic gripper 12, and an electric screwdriver 13. The translation bracket 10 is slidably connected to the gantry frame 8, the lifting bracket 11 is lifted and lowered to the translation bracket 10, the pneumatic gripper 12 is lifted and lowered to the lifting bracket 11, and the electric screwdriver 13 is located on the lifting bracket 11.

[0022] Specifically, when the mounting manipulator installs the dynamic balance block, the gantry 8 moves, so that the translation support 10 is first located above the placement disc 9, then the pneumatic clamping jaw 12 accurately corresponds to the dynamic balance block on the placement disc 9 through the movement of the gantry 8 and the translation support 10, the lifting support 11 drives the pneumatic clamping jaw 12 to descend to grab the corresponding dynamic balance block, and then the dynamic balance block is transferred to the counterweight structure on the steam turbine rotating shaft 6 to install the dynamic balance block on the steam turbine rotating shaft 6.

[0023] Specifically, the translation support 10 is slidably connected with the guide rod on the gantry 8, and translation is realized through cooperation of the lead screw and the lead screw nut, and the lifting plate can be lifted in the same way.

[0024] Specifically, the lifting cylinder 14 is arranged between the pneumatic clamping jaw 12 and the lifting plate, the pneumatic clamping jaw 12 is extended when the dynamic balance block is grabbed, so that the clamping jaw is located below the electric screwdriver 13, and the grabbed dynamic balance block is located directly below the electric screwdriver 13.

[0025] Specifically, the mounting manipulator can also directly use an industrial robot, and the pneumatic clamping jaw 12 and the electric screwdriver 13 are arranged on the running end of the industrial robot.

[0026] Preferably in the embodiment, the mounting manipulator is provided with a camera (not shown in the drawing), so that the clamping jaw can accurately find the corresponding dynamic balance block through the camera.

[0027] Preferably in the embodiment, the placement disc 9 is provided with a plurality of placement holes, the dynamic balance block is placed in the placement hole, and the two sides of the placement hole are provided with an empty slot, which facilitates the pneumatic clamping jaw 12 to grab the dynamic balance block in the placement hole.

[0028] Preferably in the embodiment, the detection host 2 is provided with a driving motor, the driving motor is connected with the steam turbine rotating shaft 6, and a plurality of sensors 4 are arranged between the driving motor and the steam turbine rotating shaft 6.

[0029] As Figure 1 and Figure 2As shown, the two ends of the steam turbine shaft 6 are connected to the detection host 2 and the end support 5 respectively, and the lower part of the steam turbine shaft 6 is supported by the support wheels 7 on the support frames 3, then the driving motor in the detection host 2 drives the steam turbine shaft 6 to rotate, the rotation of each outer side surface of the steam turbine shaft 6 and the vibration during rotation are detected by the built-in sensor 4 and the sensor 4 arranged on the base 1, after calculation and analysis, the steam turbine shaft 6 is stopped, the corresponding weight dynamic balance block is grabbed by the gantry 8 and the mounting manipulator on the gantry 8, and is installed on the corresponding position of the counterweight structure of the steam turbine shaft 6, then the steam turbine shaft 6 is rotated again for detection until the dynamic balance reaches the requirement, the automatic dynamic balance adjustment is realized by the gantry 8 and the mounting manipulator on the gantry 8, and the efficiency is improved.

[0030] The dynamic balance block originally installed on the steam turbine shaft 6 can also be disassembled or replaced in position by the gantry 8 and the mounting manipulator.

[0031] Specifically, the counterweight structure on the steam turbine shaft 6 can refer to the invention patent with the publication number CN117365662A.

[0032] Specifically, the dynamic balance block is connected with the steam turbine shaft 6 through threads, then the electric screwdriver 13 on the mounting manipulator is used to rotate the dynamic balance block into the screw hole after the dynamic balance block is aligned with the screw hole on the shaft by the pneumatic clamping jaw 12, and the length, weight and other parameters of the dynamic balance block have been set in the controller of the detection host in advance, so that the end surface of the dynamic balance block is flush with the outer surface of the shaft when the electric screwdriver 13 rotates the dynamic balance block.

[0033] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not limited to the above-mentioned embodiments only, and any technical solution belonging to the idea of the utility model belongs to the protection scope of the utility model. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A device for detecting dynamic balance of a rotating shaft of a steam turbine, characterized in that: The utility model provides a steam turbine rotating shaft dynamic balance testing device, including base, be provided with detection host, a plurality of support frame, a plurality of sensor and end support on the base, steam turbine rotating shaft is rotatably connected between detection host and end support, rotatably connected with support wheel on the support frame, support wheel contacts in the below of steam turbine rotating shaft, sensor is located in the above or below of rotating shaft, be provided with gantry on the base, be provided with installation mechanical hand on the gantry, be provided with placing disc on the base, be provided with a plurality of dynamic balancing mass in the placing disc, gantry, support frame and end support all are with base sliding connection.

2. A steam turbine shaft dynamic balance detection device according to claim 1, characterized in that: The installation mechanical hand includes translational support, lifting support, pneumatic clamping jaw and electric screwdriver, the translational support is slidably connected with the gantry, the lifting support is connected with the translational support, the pneumatic clamping jaw is connected with the lifting support, and the electric screwdriver is located on the lifting support.

3. A steam turbine shaft dynamic balance detection apparatus according to claim 2, characterized in that: The installation mechanical hand is provided with a camera.

4. The turbine shaft dynamic balance detection apparatus according to claim 1, characterized by: The placing disc is provided with a plurality of placing holes, the dynamic balancing mass is placed in the placing hole, and air-avoiding grooves are arranged on both sides of the placing hole.

5. The turbine shaft dynamic balance detection apparatus according to claim 1, characterized in that: The detection host is provided with a driving motor, the driving motor is connected with the steam turbine rotating shaft, and a plurality of sensors are arranged between the driving motor and the steam turbine rotating shaft.

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