Dynamic balance detection device adaptive to immersed pump rotors of multiple specifications

Abstract

The utility model discloses a dynamic balance detection device adapted to immersed pump rotors of multiple specifications, which comprises a support assembly, a supporting assembly, a driving assembly and a detection assembly, the supporting assembly comprises a transverse moving mechanism with a lockable moving end, and the fixed end of the transverse moving mechanism is fixedly connected to the support assembly. The two moving ends of the transverse moving mechanism are fixedly connected with a first supporting plate and a second supporting plate correspondingly, a vertical moving mechanism is arranged on the first supporting plate, and the driving assembly comprises a linear driving mechanism which is fixedly connected to the support assembly and conducts longitudinal driving. The detection assembly comprises two laser displacement sensors connected to the first supporting plate and the second supporting plate respectively, the two laser displacement sensors are vertically adjustable, and the detection ends of the two laser displacement sensors face the two ends of the rotor respectively. The device can adapt to dynamic balance detection of immersed pump rotors of various specifications such as different lengths, different end part diameters and different maximum diameters.

Description

Technical Field

[0001] This utility model belongs to the field of rotor dynamic balancing testing technology, and in particular relates to a dynamic balancing testing device for submersible pump rotors of various specifications. Background Technology

[0002] Existing LNG submersible pumps generally employ multi-stage impellers and complex flow channel designs, requiring the rotors to operate under low temperature and high pressure environments for extended periods. Rotor misalignment can lead to increased vibration, seal failure, and even impeller wear. Furthermore, prolonged operation of LNG submersible pumps can result in bearing wear and impeller jamming, necessitating regular maintenance. However, the compact design of submersible pumps necessitates complete disassembly for maintenance, which affects the rotor's dynamic balance. Therefore, a rotor dynamic balancing testing device is required. However, submersible pump rotors from different manufacturers vary in specifications, primarily in rotor length and maximum diameter, making existing rotor dynamic balancing testing devices ill-suited for testing these diverse rotor sizes. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a dynamic balancing testing device for submersible pump rotors of various specifications, which can be used to test the dynamic balancing of submersible pump rotors of various specifications.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A dynamic balancing testing device for submersible pump rotors of various specifications is provided, comprising a bracket assembly, a support assembly, a drive assembly, and a testing assembly.

[0006] The support assembly includes a lateral moving mechanism with a lockable movable end. The fixed end of the lateral moving mechanism is fixedly connected to the bracket assembly. The two movable ends of the lateral moving mechanism are respectively fixedly connected to a first support plate and a second support plate. A vertical moving mechanism is provided on the first support plate. The movable end of the vertical moving mechanism is connected to two first bearings for jointly supporting the thin end of the rotor. The second support plate is connected to two second bearings for jointly supporting the thick end of the rotor. The axes of the first bearings and the second bearings both extend laterally.

[0007] The drive assembly includes a rotary drive mechanism fixedly connected to the bracket assembly, a first pulley fixedly connected to the output end of the rotary drive mechanism, a linear drive mechanism fixedly connected to the bracket assembly and driven longitudinally, a second pulley connected to the output end of the linear drive mechanism, a belt for winding around the first pulley, the second pulley and the rotor, and two third pulleys located on both sides of the rotor for pressing the belt onto the rotor. The first pulley and the second pulley are located on both sides of the rotor, and the rotation center lines of the first pulley, the second pulley and the third pulley all extend laterally.

[0008] The detection assembly includes two laser displacement sensors connected to the first support plate and the second support plate respectively. The two laser displacement sensors are vertically adjustable, and the detection ends of the two laser displacement sensors face the two ends of the rotor respectively.

[0009] Furthermore, the lateral movement mechanism includes two laterally extending linear guides, the slide rails of the two linear guides are fixedly connected to the bracket assembly, a slider of the two linear guides is fixedly connected to the lower ends of the first support plate, and another slider of the two linear guides is fixedly connected to the lower ends of the second support plate; a guide rail clamp for locking the slider to the slide rail is fixedly connected to the slider.

[0010] Furthermore, limit bolts are installed at both ends of the slide rail.

[0011] Furthermore, the vertical moving mechanism includes a lead screw that is rotatably connected to the first support plate at its lower end and a lead screw nut that is threaded onto the lead screw. The end of the lead screw nut near the second support plate is connected to two first bearings. Two sliding grooves are vertically provided on the first support plate, and the two sides of the lead screw nut are vertically slidably connected in the two sliding grooves.

[0012] Furthermore, the two first bearings have the same height, the two second bearings have the same height, and the planes of symmetry of the two first bearings coincide with the planes of symmetry of the two second bearings.

[0013] Furthermore, the output end of the linear drive mechanism is connected to a laterally extending connecting shaft, and the drive assembly includes a guide rail plate fixedly connected to the bracket assembly. The guide rail plate is provided with a longitudinal guide rail for slidingly connecting the connecting shaft in the longitudinal direction. The connecting shaft passes laterally through the longitudinal guide rail and is coaxially connected to the second pulley.

[0014] Furthermore, both the first and second support plates are equipped with vertical guide rails, and the detection component includes fastening bolts. One end of the fastening bolt passes through the vertical guide rail and is threadedly connected to the laser displacement sensor.

[0015] Furthermore, the rotary drive mechanism is a pneumatic motor, the linear drive mechanism is a direct-push cylinder, and the drive assembly includes an oil-water separator and a three-way pipe. The oil-water separator is fixedly connected to the bracket assembly. One end of the oil-water separator is connected to a compressed air source, and the other end of the oil-water separator is connected to one end of the three-way pipe. The other two ends of the three-way pipe are connected to the rotary drive mechanism and the linear drive mechanism through a first valve and a second valve, respectively.

[0016] Furthermore, the detection component includes an emergency stop button fixedly connected to the bracket assembly, a touch screen PLC all-in-one machine, a first running indicator light and a second running indicator light, and the touch screen PLC all-in-one machine is electrically connected to two laser displacement sensors, the emergency stop button, the first running indicator light and the second running indicator light.

[0017] Furthermore, the support assembly includes a perforated base plate, four feet fixedly connected to the four corners of the lower end of the perforated base plate, a top plate, a main frame fixedly connected between the perforated base plate and the top plate, and an electrical box fixedly connected to the top plate.

[0018] The beneficial effects of this utility model are as follows:

[0019] The lateral moving mechanism allows adjustment of the lateral distance between the first and second support plates to accommodate dynamic balancing tests of rotors of different lengths. After the thicker end of the rotor is placed on the two first bearings, the vertical moving mechanism allows adjustment of the vertical position of the two second bearings to accommodate dynamic balancing tests of rotors with different end diameters. The linear drive mechanism allows adjustment of the longitudinal position of the second pulley to tension the belt and apply it to the rotor, thus facilitating dynamic balancing tests of rotors with different maximum diameters. In summary, this invention can accommodate dynamic balancing tests of submersible pump rotors of various specifications. Attached Figure Description

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings. Wherein:

[0021] Figure 1 A schematic diagram of the structure of this utility model is shown;

[0022] Figure 2 A schematic diagram of the installation of the support components in this utility model is shown;

[0023] Figure 3 A schematic diagram of the installation of the drive component in this utility model is shown;

[0024] Figure 4 A schematic diagram of the installation of the detection component in this utility model is shown;

[0025] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0026] Figure label:

[0027] 1. Bracket assembly; 101. Foot cup; 102. Perforated base plate; 103. Main frame; 104. Electrical box; 105. Top plate; 2. Support assembly; 201. Linear guide rail; 202. Second support plate; 203. Second bearing; 204. First support plate; 205. Vertical moving mechanism; 206. First bearing; 207. Limit bolt; 208. Guide rail clamp; 3. Drive assembly; 301. Rotation drive mechanism; 302. First pulley; 303. Connecting arm; 304. 305. Third pulley; 306. Belt; 307. Linear drive mechanism; 308. Guide rail plate; 309. Second pulley; 310. Second valve; 311. T-connector; 312. Oil-water separator; 313. Quick-connect female connector; 314. First valve; 505. Rotor; 606. Detection assembly; 507. Laser displacement sensor; 508. Fastening bolt; 509. Touch screen PLC all-in-one machine; 5000. Emergency stop button; 5001. First running indicator light; 501. Second running indicator light. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Because the rotors of submersible pumps produced by different manufacturers have different specifications, and the main differences are in rotor length and maximum rotor diameter, existing rotor dynamic balancing testing devices are difficult to adapt to the dynamic balancing testing of these various specifications of submersible pump rotors.

[0030] Furthermore, current technology typically assesses dynamic balance by measuring the degree of concentricity, which is inaccurate. When testing rotor concentricity, two supports are usually used to place the rotor on a horizontal, fixed surface, and a contact-type concentricity measuring instrument is placed on the rotor. The rotor coil is then manually rotated, and the change in the instrument reading is visually observed. This method has significant drawbacks: manual readings have large errors; directly rotating the rotor coil by hand leads to uneven rotation speed and significant fluctuations, failing to capture dynamic fluctuations at high speeds; and sometimes, operators rely on experience to judge calibration results, with subjective factors affecting the accuracy of the test results.

[0031] This utility model provides a dynamic balancing testing device for submersible pump rotors of various specifications, such as... Figure 1-4 As shown, it includes a bracket assembly 1, a support assembly 2, a drive assembly 3, and a detection assembly 5;

[0032] The support assembly 2 includes a lateral moving mechanism with a lockable movable end. The fixed end of the lateral moving mechanism is fixedly connected to the bracket assembly 1. The two movable ends of the lateral moving mechanism are respectively fixedly connected to a first support plate 204 and a second support plate 202. A vertical moving mechanism 205 is provided on the first support plate 204. The movable end of the vertical moving mechanism 205 is connected to two first bearings 206 for jointly supporting the thin end of the rotor 4. Two second bearings 203 for jointly supporting the thick end of the rotor 4 are connected on the second support plate 202. The axes of the first bearings 206 and the second bearings 203 both extend laterally. The first bearings 206 and the second bearings 203 are both deep groove ball bearings.

[0033] The drive assembly 3 includes a rotary drive mechanism 301 fixedly connected to the bracket assembly 1, a first pulley 302 fixedly connected to the output end of the rotary drive mechanism 301, a linear drive mechanism 306 fixedly connected to the bracket assembly 1 and driven longitudinally, a second pulley 308 connected to the output end of the linear drive mechanism 306, a belt 305 for winding around the first pulley 302, the second pulley 308 and the rotor 4, and two third pulleys 304 located on both sides of the rotor 4 for pressing the belt 305 onto the rotor 4. The first pulley 302 and the second pulley 308 are located on both sides of the rotor 4, and the rotation center lines of the first pulley 302, the second pulley 308 and the third pulley 304 all extend laterally.

[0034] The detection component 5 includes two laser displacement sensors 501 connected to the first support plate 204 and the second support plate 202 respectively. The two high-precision laser displacement sensors 501 are vertically adjustable, and the detection ends of the two laser displacement sensors 501 are horizontally oriented towards the two ends of the rotor 4 respectively.

[0035] It is understood that, by using the lateral moving mechanism, the lateral distance between the first support plate 204 and the second support plate 202 can be adjusted to accommodate dynamic balance testing of rotors 4 of different lengths; after the thick end of the rotor 4 is placed on the two first bearings 206, the vertical moving mechanism 205 can be used to adjust the vertical position of the two second bearings 203 to accommodate dynamic balance testing of rotors 4 with different end diameters; by using the linear drive mechanism 306, the longitudinal position of the second pulley 308 can be adjusted so that the belt 305 acts on the rotor 4 by tensioning the belt 305, which is beneficial for accommodating dynamic balance testing of rotors 4 with different maximum diameters; in summary, this utility model can accommodate dynamic balance testing of submersible pump rotors 4 of multiple specifications.

[0036] It should be noted that the height of the two third pulleys 304 is slightly lower than that of the rotor 4. When the belt 305 is wound, it passes through the lower end of one third pulley 304, the upper end of the rotor 4, and the lower end of the other third pulley 304, so as to press the belt 305 onto the rotor 4.

[0037] In one embodiment, the lateral movement mechanism includes two laterally extending linear guides 201, the slide rails of the two linear guides 201 are fixedly connected to the bracket assembly 1, a slider of the two linear guides 201 is fixedly connected to the lower ends of the first support plate 204, and another slider of the two linear guides 201 is fixedly connected to the lower ends of the second support plate 202; a guide rail clamp 208 for locking the slider to the slide rail is fixedly connected to the slider.

[0038] In one embodiment, limit bolts 207 are provided at both ends of the slide rail to prevent the slider from derailing from the slide rail.

[0039] In one embodiment, the vertical moving mechanism 205 includes a lead screw rotatably connected to a first support plate 204 at its lower end and a lead screw nut threadedly connected to the lead screw rotatable end. The end of the lead screw nut near the second support plate 202 is connected to two first bearings 206. Two sliding grooves are vertically provided on the first support plate 204, and the two sides of the lead screw nut are vertically slidably connected in the two sliding grooves. When the lead screw rotatable end rotates, the lead screw nut can move vertically because the two sides of the lead screw nut are restricted by the two vertical sliding grooves, so as to adjust the height of the two first bearings 206.

[0040] In one embodiment, the two first bearings 206 have the same height, the two second bearings 203 have the same height, and the plane of symmetry of the two first bearings 206 coincides with the plane of symmetry of the two second bearings 203.

[0041] In one embodiment, the output end of the linear drive mechanism 306 is connected to a laterally extending connecting shaft. The drive assembly 3 includes a guide rail plate 307 fixedly connected to the bracket assembly 1. The guide rail plate 307 is provided with a longitudinal guide rail for slidingly connecting the connecting shaft in the longitudinal direction. The connecting shaft passes laterally through the longitudinal guide rail and is coaxially connected to the second pulley 308. The longitudinal guide rail provides guidance for the connecting shaft so that the second pulley 308 moves more smoothly in the longitudinal direction.

[0042] In one embodiment, both the first support plate 204 and the second support plate 202 are provided with vertical guide rails, and the detection component 5 includes a fastening bolt 502. One end of the fastening bolt 502 passes through the vertical guide rail and is threadedly connected to the laser displacement sensor 501.

[0043] In one embodiment, the rotary drive mechanism 301 is a pneumatic motor, the linear drive mechanism 306 is a direct-push cylinder, and the drive assembly 3 includes an oil-water separator 311 and a three-way pipe 310 with an equal diameter tee fitting. The oil-water separator 311 is fixedly connected to the support assembly 1. One end of the oil-water separator 311 is connected to a compressed air source through a quick-connect female connector 312, which is also fixed to the support assembly 1. The other end of the oil-water separator 311 is connected to one end of the three-way pipe 310. The other two ends of the three-way pipe 310 are connected to the rotary drive mechanism 301 and the linear drive mechanism 306 through a first valve 313 and a second valve 309, respectively.

[0044] It should be noted that the first valve 313 is a two-position three-way solenoid valve, and the second valve 309 is a two-position five-way solenoid valve. The first valve 313 and the second valve 309 are fixed on the bracket assembly 1. The oil-water separator 311 is mainly used to filter oil and water molecules in the compressed air to ensure that pneumatic components such as the rotary drive mechanism 301 and the linear drive mechanism 306 are not corroded. The equal diameter three-way compression fitting, this three-way pipe 310, is mainly used to split the compressed air source.

[0045] In one embodiment, the detection component 5 includes an emergency stop button 504 fixedly connected to the bracket component 1, a touch screen PLC all-in-one machine 503, a first running indicator light 505 and a second running indicator light 506. The touch screen PLC all-in-one machine 503 is electrically connected to a first valve 313, a second valve 309, two laser displacement sensors 501, the emergency stop button 504, the first running indicator light 505 and the second running indicator light 506.

[0046] It should be noted that the first operating indicator light 505 emits green light, and the second operating indicator light 506 emits red light.

[0047] In one embodiment, the bracket assembly 1 includes a perforated base plate 102, four height-adjustable feet 101 fixedly connected to the four corners of the lower end of the perforated base plate 102, a top plate 105, a main frame 103 welded between the perforated base plate 102 and the top plate 105, and an electrical box 104 fixedly connected to the top plate 105.

[0048] It should be noted that the four height-adjustable foot cups 101 can adjust the horizontal height of the four corners of the perforated base plate 102, thereby ensuring that the dynamic balance testing device for multi-specification submersible pump rotors is placed horizontally.

[0049] It should be noted that the emergency stop button 504, the touch screen PLC all-in-one machine 503, the first running indicator light 505 and the second running indicator light 506 are all fixed on the electrical box 104; the oil-water separator 311 is fixed on the upper end of the bottom plate 102 with holes; the slide rails of the two linear guide rails 201, the rotary drive mechanism 301, the linear drive mechanism 306 and the guide rail plate 307 are all fixed on the upper end of the top plate 105, and the third pulley 304 is fixed on the upper end of the top plate 105 through the connecting arm 303.

[0050] The operation process of this utility model is as follows:

[0051] After the rotor dynamic balancing testing device is leveled in a fixed position, connect the power supply and connect the quick-connect female connector 312 to the compressed air source;

[0052] The thick end of the disassembled rotor 4 is placed stably on the two second bearings 203, and then the lead screw is rotated to place the thin end of the rotor 4 on the two first bearings 206 after adjusting the height of the two first bearings 206.

[0053] Wrap the belt 305 around the rotor 4 and press the belt tensioning function key on the touch screen PLC all-in-one machine 503 so that the compressed air passes through the second valve 309 and pushes out the output end of the linear drive mechanism 306, thereby tensioning the belt 305; wherein, the thrust of the linear drive mechanism 306 meets the tensioning requirements to ensure that it will not have an adverse effect on the overall transmission after the belt 305 is tensioned.

[0054] Adjust the height of the two laser displacement sensors 501 so that the infrared lasers of the two laser displacement sensors hit both ends of the rotor 4.

[0055] After the two laser displacement sensors 501 are fixed, reset the two laser displacement sensors 501, press the start detection function key of the touch screen PLC all-in-one machine 503, so that the compressed air passes through the first valve 313 and causes the rotation drive mechanism 301 to start rotating, thereby driving the first pulley 302 fixedly connected to its output end to rotate, and then driving the rotor 4 to start rotating.

[0056] The data detected by the two laser displacement sensors 501 is displayed through the touch screen PLC all-in-one machine 503, and a dynamic threshold can be set through the touch screen PLC all-in-one machine 503. When the radial runout is >0.03mm, an alarm is triggered, causing the second indicator light to light up; under normal circumstances, the first indicator light is on while the second indicator light is off.

[0057] Meanwhile, the touch screen PLC all-in-one machine 503 can convert data to accurately assess whether the dynamic balance of rotor 4 during testing is normal; in case of emergency, the emergency stop button 504 can be pressed, the first valve 313 and the second valve 309 will be de-energized, and the rotor dynamic balance testing device will stop running.

[0058] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0059] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A dynamic balancing testing device for submersible pump rotors of various specifications, characterized in that, It includes a bracket assembly (1), a support assembly (2), a drive assembly (3), and a detection assembly (5); The support assembly (2) includes a lateral movement mechanism with a lockable movable end. The fixed end of the lateral movement mechanism is fixedly connected to the bracket assembly (1). The two movable ends of the lateral movement mechanism are respectively fixedly connected to a first support plate (204) and a second support plate (202). A vertical movement mechanism (205) is provided on the first support plate (204). The movable end of the vertical movement mechanism (205) is connected to two first bearings (206) for jointly supporting the thin end of the rotor (4). Two second bearings (203) for jointly supporting the thick end of the rotor (4) are connected on the second support plate (202). The axes of the first bearings (206) and the second bearings (203) extend laterally. The drive assembly (3) includes a rotary drive mechanism (301) fixedly connected to the bracket assembly (1), a first pulley (302) fixedly connected to the output end of the rotary drive mechanism (301), a linear drive mechanism (306) fixedly connected to the bracket assembly (1) and driven longitudinally, a second pulley (308) connected to the output end of the linear drive mechanism (306), a belt (305) for winding around the first pulley (302), the second pulley (308) and the rotor (4), and two third pulleys (304) located on both sides of the rotor (4) for pressing the belt (305) onto the rotor (4). The first pulley (302) and the second pulley (308) are located on both sides of the rotor (4), and the rotation center lines of the first pulley (302), the second pulley (308) and the third pulley (304) all extend laterally. The detection component (5) includes two laser displacement sensors (501) connected to the first support plate (204) and the second support plate (202) respectively. The two laser displacement sensors (501) are vertically adjustable, and the detection ends of the two laser displacement sensors (501) are respectively facing the two ends of the rotor (4).

2. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, The lateral movement mechanism includes two laterally extending linear guides (201), and the slide rails of the two linear guides (201) are fixedly connected to the bracket assembly (1). The lower ends of the first support plate (204) are respectively fixedly connected to a slider of the two linear guides (201), and the lower ends of the second support plate (202) are respectively fixedly connected to another slider of the two linear guides (201). A guide rail clamp (208) for locking the slider to the slide rail is fixedly connected to the slider.

3. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 2, characterized in that, Limit bolts (207) are provided at both ends of the slide rail.

4. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, The vertical moving mechanism (205) includes a lead screw that is rotatably connected to the first support plate (204) at its lower end and a lead screw nut that is threaded onto the lead screw. The end of the lead screw nut near the second support plate (202) is connected to two first bearings (206). Two sliding grooves are vertically provided on the first support plate (204), and the two sides of the lead screw nut are vertically slidably connected in the two sliding grooves.

5. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, The two first bearings (206) have the same height, the two second bearings (203) have the same height, and the plane of symmetry of the two first bearings (206) coincides with the plane of symmetry of the two second bearings (203).

6. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, The output end of the linear drive mechanism (306) is connected to a laterally extending connecting shaft. The drive assembly (3) includes a guide rail plate (307) fixedly connected to the bracket assembly (1). The guide rail plate (307) is provided with a longitudinal guide rail for slidingly connecting the connecting shaft in the longitudinal direction. The connecting shaft passes laterally through the longitudinal guide rail and is coaxially connected to the second pulley (308).

7. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, Both the first support plate (204) and the second support plate (202) are provided with vertical guide rails. The detection component (5) includes a fastening bolt (502). One end of the fastening bolt (502) passes through the vertical guide rail and is threaded to the laser displacement sensor (501).

8. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, The rotary drive mechanism (301) is a pneumatic motor, the linear drive mechanism (306) is a direct-push cylinder, and the drive assembly (3) includes an oil-water separator (311) and a three-way pipe (310). The oil-water separator (311) is fixedly connected to the bracket assembly (1). One end of the oil-water separator (311) is connected to a compressed air source, and the other end of the oil-water separator (311) is connected to one end of the three-way pipe (310). The other two ends of the three-way pipe (310) are connected to the rotary drive mechanism (301) and the linear drive mechanism (306) respectively through a first valve (313) and a second valve (309).

9. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, The detection component (5) includes an emergency stop button (504), a touch screen PLC all-in-one machine (503), a first running indicator (505), and a second running indicator (506) fixedly connected to the bracket assembly (1). The touch screen PLC all-in-one machine (503) is electrically connected to two laser displacement sensors (501), the emergency stop button (504), the first running indicator (505), and the second running indicator (506).

10. The dynamic balancing testing device for multi-specification submersible pump rotors according to claim 1, characterized in that, The bracket assembly (1) includes a perforated base plate (102), four foot cups (101) fixedly connected to the four corners of the lower end of the perforated base plate (102), a top plate (105), a main frame (103) fixedly connected between the perforated base plate (102) and the top plate (105), and an electrical box (104) fixedly connected to the top plate (105).

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