Dynamic balance test board for motor rotor

Abstract

The utility model relates to the technical field of rotor dynamic balance, and discloses a motor rotor dynamic balance testboard, which comprises a base and an upper plate, the upper plate is transversely supported above the base, a lifting plate is transversely arranged at the middle position below the upper plate, and electric push rods are vertically arranged above the upper plate on two sides of the lifting plate. The bottom of the electric push rod is fixed to the surface of the lifting plate, a plurality of abutting plates are evenly arranged on a bottom plate of the lifting plate, pressing wheels are installed at the bottoms of the abutting plates, connecting rods penetrating to the position above the lifting plate are vertically fixed to the positions above the two sides of the abutting plates, and infrared sensors are installed on the surfaces of the abutting plates. According to the technical scheme of the utility model, the lifting plate capable of being driven to lift is arranged above the detection position, the bottom surface of the lifting plate is provided with the plurality of pinch rollers, the pinch rollers can abut against the surface of the rotor during detection, and when an uneven position exists, the pinch rollers can rise or fall, and the distance change is detected by the infrared sensor. When dynamic balance is detected, the flat state of the surface of the rotor can be detected at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor dynamic balancing, in particular to a motor rotor dynamic balancing test bench. Background Art

[0002] The motor consists of two parts, the rotor and the stator. It is a device used to realize the conversion of electrical energy into mechanical energy and mechanical energy into electrical energy. The motor rotor is divided into electric motor rotor and generator rotor. Using unqualified motor rotors will cause the center of mass of the rotor to deviate from the actual center inertia axis of the rotor, causing the rotor to have a large imbalance after reaching the operating speed. The dynamic balancing test is the process of dynamic balancing detection and correction of the rotor to meet the use requirements, so as to ensure the stable use of the motor rotor.

[0003] During the test, the rotor is driven to rotate and the dynamic balance state of the rotor is determined by using a vibration sensor. However, when the outer ring surface of the motor rotor is uneven or has burrs, it cannot be detected. Therefore, we propose a motor rotor dynamic balance test bench. Utility Model Content

[0004] The purpose of the utility model is to provide a motor rotor dynamic balancing test bench, which is provided with a lifting plate that can be driven to rise and fall above the detection position, and a plurality of pressure wheels are installed on the bottom surface of the lifting plate, which can be pressed against the surface of the rotor during detection. When an uneven position exists, the pressure wheels will rise or fall in height and the distance change will be detected by an infrared sensor. When detecting dynamic balance, the flatness of the rotor surface can be detected at the same time, thereby solving the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a motor rotor dynamic balancing test bench, comprising a base and an upper plate, both sides of the surface of the base are provided with support platforms, the surface of the support platforms is provided with vibration sensors, and the front and rear end surfaces of the vibration sensors are provided with guide wheels; the upper plate is laterally supported and placed above the base, a lifting plate is laterally provided at the middle position below the upper plate, electric push rods are vertically installed above the upper plates on both sides of the lifting plate, the bottom of the electric push rods is fixed to the surface of the lifting plate, a plurality of abutment plates are evenly provided on the bottom plate of the lifting plate, a pressure wheel is installed at the bottom of the abutment plate, connecting rods penetrating to the top of the lifting plate are vertically fixed above both sides of the abutment plate, a limit plate abutting against the surface of the lifting plate is welded and fixed on the top of the connecting rod, an abutment spring is sleeved on the outer ring of the connecting rod between the lifting plate and the abutment plate, and an infrared sensor is installed on the surface of the abutment plate; the front and rear ends of the middle position of the base are rotatably provided with upper guide rollers and lower guide rollers through side plates, and a belt is arranged between the two upper guide rollers and the two lower guide rollers.

[0006] By adopting the above technical solution, the electronic rotor is laterally supported above the guide wheel between the supports, and the dynamic balance of the rotor can be detected when it is driven by a belt to rotate. In this process, the lifting plate can also drive the pressure wheel to lower its height and contact the outer surface of the rotor. The lifting and lowering changes of the pressure wheel are detected by the infrared sensor, and the flatness of the outer surface of the rotor is detected.

[0007] Optionally, a stepper motor is installed on the surface of the side plate on the side of the lower guide roller, and the stepper motor is transmission-connected to the lower guide roller.

[0008] By adopting the above technical solution, the stepper motor drives the lower guide roller to rotate, thereby driving the belt to rotate under the guidance of the upper guide roller.

[0009] Optionally, a slide groove is vertically opened in the side plates at both ends of the upper guide roller, a slider is slidably arranged in the slide groove, and the two ends of the upper guide roller are rotatably connected to the slider in the slide groove.

[0010] By adopting the above technical solution, when the slider is placed in the slide groove and slides up and down, the tightness of the belt can be changed.

[0011] Optionally, a gas spring is vertically installed in the slide groove below the slider, and the top of the gas spring abuts against the bottom surface of the slider.

[0012] By adopting the above technical solution, the gas spring maintains the upward push action on the slider and the upper guide roller, so that the belt is tightened and pressed against the lower surface of the rotor.

[0013] Optionally, the outer rings of the upper guide roller and the lower guide roller are both provided with an annular groove body, and the belt is in contact with the annular groove body of the upper guide roller and the lower guide roller.

[0014] By adopting the above technical solution, the belt is limitedly sleeved on the outer rings of the upper guide roller and the lower guide roller under the action of the annular groove body.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The technical solution of the present application is to provide a lifting plate that can be driven to rise and fall above the detection position, and a plurality of pressure wheels are installed on the bottom surface of the lifting plate, which can be pressed against the surface of the rotor during detection. When there is an uneven position, the pressure wheel will rise or fall in height and the distance change will be detected by the infrared sensor. When detecting dynamic balance, the flatness of the rotor surface can be detected at the same time.

[0017] 2. The technical solution of the present application is to set up a gas spring to push the sliders at both ends of the upper guide roller upward. The sliders can be slidably placed in the slide grooves to push the upper guide roller upward so that the belt can be tightly pressed against the lower surface of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the motor rotor dynamic balancing test bench of the utility model;

[0020] Figure 2 It is a schematic diagram of the side view of the base surface of the motor rotor dynamic balancing test bench of the utility model;

[0021] Figure 3 The utility model is a schematic diagram of the pressure wheel installation structure of the motor rotor dynamic balancing test bench.

[0022] In the figure: 1. base; 2. upper plate; 3. support platform; 31. vibration sensor; 311. guide wheel; 4. lifting plate; 41. electric push rod; 42. pressure wheel; 421. abutment plate; 422. connecting rod; 423. limit plate; 424. abutment spring; 425. infrared sensor; 5. side plate; 51. lower guide roller; 511. stepping motor; 52. upper guide roller; 521. slider; 53. belt; 54. slide groove; 541. gas spring. DETAILED DESCRIPTION

[0023] See also Figure 1-3 The utility model provides a technical solution: a motor rotor dynamic balancing test bench, including a base 1 and an upper plate 2, support platforms 3 are arranged on both sides of the surface of the base 1, and the support platforms 3 on both sides have the same height. Vibration sensors 31 are installed on the surfaces of the support platforms 3, and guide wheels 311 are installed on the front and rear surfaces of the vibration sensor 31. The rotor to be tested is placed horizontally between the support platforms 3 on both sides, and then the shaft bodies at both ends of the rotor are supported between the guide wheels 311 at the front and rear ends, which can realize the guiding support of the rotor, and when the rotor rotates, the vibration can be detected by the vibration sensor 31, and then the dynamic balancing state of the rotor can be judged.

[0024] Side plates 5 are vertically fixed at the front and rear ends of both sides of the middle position of the base 1. The side plates 5 on both sides are parallel to each other. A lower guide roller 51 is rotatably installed between the lower parts of the side plates 5. A stepper motor 511 is installed on the surface of the side plate 5 on the side of the lower guide roller 51. The stepper motor 511 is transmission-connected to the lower guide roller 51. When the stepper motor 511 is started, the lower guide roller 51 can be driven to rotate. A slide groove 54 is vertically opened on the upper part of the surface of the side plate 5. A slider 521 is slidably embedded and fixed inside the slide groove 54. A gas spring 541 is vertically installed in the slide groove 54 below the slider 521. The upper part of the gas spring 541 contacts the bottom surface of the slider 521, which has an upward resistance to the slider 521. An upper guide roller 52 is rotatably installed between the sliders 521 in 54, and the outer rings of the upper guide roller 52 and the lower guide roller 51 are both provided with an annular groove body, so that a belt 53 is arranged between the two upper guide rollers 52 and the two lower guide rollers 51 through the annular groove body transmission sleeve. When the rotor is lowered, its outer surface contacts the surface of the belt 53, pressing the belt 53 downward, so that the upper guide rollers 52 on both sides slide down under the action of the slider 521 placed in the slide groove 54. Due to the support of the gas spring 541, the upper guide roller 52 is supported upward, so that the belt 53 can be closely attached to the outer surface of the rotor. When the stepper motor 511 drives the lower guide roller 51 to rotate, the belt 53 is driven to rotate, thereby driving the rotor to rotate.

[0025] The upper plate 2 is laterally supported and placed above the base 1. The upper plate 2 is parallel to the surface of the base 1. A lifting plate 4 is laterally arranged in the middle position below the upper plate 2. The lifting is parallel to the surface of the upper plate 2. Electric push rods 41 are vertically installed above the upper plate 2 on both sides of the lifting plate 4. The bottom of the electric push rod 41 penetrates to the bottom of the upper plate 2 and is fixed to the surface of the lifting plate 4, which can drive the lifting height of the lifting plate 4. A plurality of abutment plates 421 are evenly arranged on the bottom plate of the lifting plate 4. A rotatable pressure wheel 42 is installed at the bottom of the abutment plate 421. Connecting rods 422 are vertically fixed above both sides of the abutment plate 421. The connecting rods 422 can slide vertically. The limit plate 423 is welded and fixed to the top of the lifting plate 4, and the limit plate 423 is in contact with the surface of the lifting plate 4. The outer ring of the connecting rod 422 between the lifting plate 4 and the abutment plate 421 is sleeved with a abutment spring 424, which will push the abutment plate 421 and the pressure wheel 42 downward. When it is driven to lower the height together with the lifting plate 4, it abuts on the surface of the rotor under the action of the abutment spring 424, and an infrared sensor 425 is installed on the surface of the abutment plate 421, and its probe faces upward, which can detect the distance change from the lifting plate 4 at any time and judge the flatness of the rotor surface.

[0026] When in use, the vibration sensor 31, the electric push rod 41, the infrared sensor 425, the stepper motor 511 and the hydraulic station of the hydraulic cylinder are all connected to the industrial control computer, and the motor rotor is placed horizontally between the support platforms 3 on both sides, so that the shafts at both ends of the rotor are supported between the guide wheels 311 on both sides respectively. At this time, the bottom outer surface of the rotor contacts the surface of the belt 53, and presses the belt 53 downward, so that the upper guide rollers 52 on both sides slide down under the action of the slider 521 placed in the slide groove 54. Due to the support of the gas spring 541, the upper guide roller 52 is supported upward, so that the belt 53 can be closely attached to the surface of the rotor. The electric push rod 41 then drives the lifting plate 4 and the pressure wheel 42 at the bottom to descend, and makes the pressure wheel 42 contact the outer surface of the rotor, and then starts the stepper motor 511 to drive the lower guide wheel 311 and drive the belt 53 to rotate, and drives the rotor to rotate through the belt 53. In this process, the dynamic balance state of the drill is detected and judged by the vibration sensor 31; and the pressure wheel 42 presses the outer surface of the rotor. When there is an uneven position on the rotor surface, the pressure wheel 42 will rise or be pressed down by the spring 424, and the distance change can be detected by the infrared sensor 425, and the flatness of the rotor surface can be detected at the same time.

Claims

1. A motor rotor dynamic balancing test bench, comprising a base (1) and an upper plate (2), characterized in that: Support platforms (3) are provided on both sides of the surface of the base (1), a vibration sensor (31) is installed on the surface of the support platform (3), and guide wheels (311) are installed on the front and rear surfaces of the vibration sensor (31); The upper plate (2) is laterally supported and placed above the base (1); a lifting plate (4) is laterally arranged in the middle position below the upper plate (2); electric push rods (41) are vertically installed above the upper plate (2) on both sides of the lifting plate (4); the bottom of the electric push rods (41) is fixed on the surface of the lifting plate (4); a plurality of abutment plates (421) are evenly arranged on the bottom plate of the lifting plate (4); a pressure wheel (42) is installed at the bottom of the abutment plate (421); connecting rods (422) penetrating to the top of the lifting plate (4) are vertically fixed above both sides of the abutment plate (421); a limit plate (423) abutting against the surface of the lifting plate (4) is welded and fixed to the top of the connecting rod (422); a abutment spring (424) is sleeved on the outer ring of the connecting rod (422) between the lifting plate (4) and the abutment plate (421); an infrared sensor (425) is installed on the surface of the abutment plate (421); The front and rear ends of the middle position of the base (1) are rotatably mounted with an upper guide roller (52) and a lower guide roller (51) via a side plate (5), and a belt (53) is arranged between the two upper guide rollers (52) and the two lower guide rollers (51).

2. The motor rotor dynamic balancing test bench according to claim 1, characterized in that: A stepping motor (511) is installed on the surface of the side plate (5) on the side of the lower guide roller (51), and the stepping motor (511) is transmission-connected to the lower guide roller (51).

3. The motor rotor dynamic balancing test bench according to claim 1, characterized in that: A slide groove (54) is vertically provided in the side plates (5) at both ends of the upper guide roller (52), a slider (521) is slidably arranged in the slide groove (54), and both ends of the upper guide roller (52) are rotatably connected to the slider (521) in the slide groove (54).

4. The motor rotor dynamic balancing test bench according to claim 3, characterized in that: A gas spring (541) is vertically installed in the slide groove (54) below the slider (521), and the upper part of the gas spring (541) abuts against the bottom surface of the slider (521).

5. The motor rotor dynamic balancing test bench according to claim 1, characterized in that: The outer rings of the upper guide roller (52) and the lower guide roller (51) are both provided with an annular groove body, and the belt (53) abuts against the annular groove body of the upper guide roller (52) and the lower guide roller (51).

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