High-efficiency and high-precision dynamic balancing machine for motor rotor

Abstract

The utility model discloses a high-efficiency and high-precision dynamic balancing machine for a motor rotor, which comprises a base, a bracket respectively connected to two ends of the base in a left-right manner and a bracket connected to the middle of the base in a lifting manner, a bearing is fixed in the middle of the bracket, a mounting ring is fixed in an inner ring of the bearing, and a guide ring and a combination ring are sequentially fixed in the mounting ring. The guide ring is a trumpet-shaped permanent magnet guide ring, a plurality of positioning tables are arranged on the combination ring in an array mode, the section of each positioning table is in an obtuse angle shape, the combination rings on the two brackets are coaxially arranged, and connecting parts corresponding to the brackets are fixed to shafts at the two ends of the motor rotor respectively. The end portions of the two connection portions are respectively provided with a frustum-shaped guide portion corresponding to the guide ring and a combination table corresponding to the combination ring, the guide portion is a permanent magnet guide portion, and the combination table is provided with positioning grooves corresponding to the positioning tables in shape. And the motor rotor is more convenient to load and unload, so that the test efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a high-efficiency and high-precision dynamic balancing machine for motor rotors. Background Art

[0002] Patent Publication No. CN210464793U discloses a roller support device for a rotor dynamic balancing machine. The device is placed on a base plate connected to a mounting plate via a horizontal adjustment mechanism. A fixed support rod and a movable support assembly are provided on the mounting plate. A second vertical rod is threadedly connected to the threaded rod. One end of the second vertical rod slides in a chute, and the other end is provided with a sliding hole for sliding an adjustment square rod. A threaded hole is provided at the top of the second vertical rod for threaded connection of a locking bolt. This solves the problem that the dynamic balancing machine cannot be adaptively adjusted according to the measurement of rotors of different lengths.

[0003] However, the support device of the rotor dynamic balancing machine with the above structure still has the following problems: the rotor shaft is supported only by the U-shaped support plate, and the rotor is not stable enough during high-speed rotation testing, which affects the test accuracy. In addition, the support device of this structure needs to be adjusted repeatedly, which is not conducive to loading and unloading the rotor, resulting in a decrease in test efficiency. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a high-efficiency and high-precision dynamic balancing machine for motor rotors.

[0005] The technical solution of the utility model is: a high-efficiency and high-precision dynamic balancing machine for motor rotors, comprising a base, brackets connected to both ends of the base, and a bracket connected to the middle of the base in a lifting manner;

[0006] The bracket has a through hole in the middle, a bearing is fixed to one end of the through hole facing the middle of the base, a mounting ring is fixed in the inner ring of the bearing, a guide ring and a coupling ring are fixed in sequence in the mounting ring, the guide ring is a trumpet-shaped permanent magnet guide ring, a plurality of positioning platforms are arrayed on the coupling ring, the cross section of each positioning platform is obtuse-angled, and the coupling rings on the two brackets are coaxially arranged;

[0007] Connecting parts corresponding to the brackets are fixed to the shafts at both ends of the motor rotor, and the ends of the two connecting parts respectively have a frustum-shaped guide part corresponding to the guide ring and a coupling platform corresponding to the coupling ring. The guide part is a permanent magnet guide part, and the coupling platform has a positioning groove corresponding to the shape of each positioning platform.

[0008] The motor rotor is supported on the bracket, and the two brackets are displaced toward the motor rotor until the connecting portion is matched with the guide ring and the coupling ring. The guide portion and the guide ring are combined under the action of magnetic attraction so that the coupling platform and the coupling ring are matched.

[0009] Furthermore, the base has a guide groove in the middle, the guide groove extends along the length direction of the base, and both ends of the guide groove are slidably connected to a slider, and the two brackets are respectively fixed on the top of the slider.

[0010] Furthermore, a screw mechanism is fixed to the left and right ends of the base respectively, and the screws of the two screw mechanisms are rotationally connected to the two sliders respectively.

[0011] Furthermore, the bracket includes two U-shaped supporting ends and a "concave"-shaped frame body, the two supporting ends are respectively located at the top of the two ends of the frame body, and the shafts at both ends of the motor rotor are respectively mounted on the supporting ends.

[0012] Furthermore, the middle portion of the base also has a avoidance groove corresponding to the bracket.

[0013] Furthermore, a cylinder is fixed in the base at the lower end of the avoidance groove, and the piston rod of the cylinder is connected to the middle part of the bottom end of the frame.

[0014] Furthermore, a guide rod is fixed to each of the two ends of the bottom of the frame, and the base at the bottom of the avoidance groove is provided with two guide holes corresponding to the two guide rods.

[0015] Furthermore, the front end surface of the coupling ring is located on the inner side of the guide ring.

[0016] Furthermore, limiting blocks are respectively fixed to the ends of the guide grooves at both ends of the avoidance grooves.

[0017] Furthermore, the connecting portion is fixed to the shaft of the motor rotor by a locking screw.

[0018] The beneficial effects of the utility model are: it can ensure that the motor rotor will not cause errors in the test due to insufficient stability in the connection with the bracket during the dynamic balancing test, thereby improving the test accuracy, and it is more convenient to load and unload the motor rotor, which can improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the utility model;

[0020] Figure 2 It is a top view of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the support seat in the utility model.

[0022] In the figure: base 1, bracket 2, bracket 3, bearing 4, guide ring 5, coupling ring 6, positioning platform 7, connecting part 8, guide groove 9, slider 10, screw mechanism 11, supporting end 12, frame 13, motor rotor 14, avoidance groove 15, cylinder 16, guide rod 17. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be further specifically described below with reference to embodiments and in conjunction with the accompanying drawings.

[0024] Combine Figure 1-3 As shown, a high-efficiency and high-precision dynamic balancing machine for motor rotors comprises a base 1, brackets 2 connected to both ends of the base 1 on the left and right sides, and a bracket 3 connected to the middle of the base 1 in a lifting manner;

[0025] The bracket 2 has a through hole in the middle, and a bearing 4 is fixed to one end of the through hole facing the middle of the base 1. A mounting ring is fixed in the inner ring of the bearing 4, and a guide ring 5 and a coupling ring 6 are fixed in sequence in the mounting ring. The guide ring 5 is a trumpet-shaped permanent magnet guide ring, and a plurality of positioning platforms 7 are arrayed on the coupling ring 6. The cross-section of each positioning platform 7 is obtuse, and the coupling rings 6 on the two brackets 2 are coaxially arranged;

[0026] Connecting parts 8 corresponding to the bracket 2 are fixed to the shafts at both ends of the motor rotor 14. The ends of the two connecting parts 8 respectively have a frustum-shaped guide part corresponding to the guide ring 5 and a coupling platform corresponding to the coupling ring 6. The guide part is a permanent magnet guide part, and the coupling platform has a positioning groove corresponding to the shape of each positioning platform 7.

[0027] The motor rotor 14 is supported on the bracket 3, and the two brackets 2 are displaced toward the motor rotor 14 until the connecting portion 8 cooperates with the guide ring 5 and the coupling ring 6. The guide portion and the guide ring 5 are combined under the action of magnetic attraction and the coupling platform and the coupling ring 6 are matched.

[0028] The working principle and beneficial effects of the above structure are as follows: first, the motor rotor 14 is placed on the bracket 3, and then the equipment is started. The two brackets 2 are respectively displaced to the two ends of the motor rotor 14 until the connecting portion 8 on the shaft of the motor rotor 14 is inserted into the bracket 2, and then the bracket 3 is lowered to place the motor rotor 14 between the two brackets 2; in this process, the guide portion on the connecting portion 8 contacts the guide ring 5 on the mounting ring, and the guide portion cooperates with the guide ring 5. Under the action of the guide portion, the combining platform and the combining ring 6 are abutted; during the magnetic attraction between the guide portion and the guide ring 5, the connecting platform and the combining ring 6 are abutted. Under the action, and because the cross-section of the positioning platform 7 on the coupling ring 6 is obtuse, the positioning groove on the coupling platform corresponds to the shape of the positioning platform 7, and the inner ring of the bearing 4 rotates a certain angle to make the coupling ring 6 match the coupling platform; at this time, the connecting parts 8 on the shafts at both ends of the motor rotor 14 are reliably combined with the two brackets 2 respectively, thereby ensuring that the motor rotor 14 will not cause errors in the test due to insufficient stability in the combination with the bracket 2 during the dynamic balancing test, thereby improving the accuracy and efficiency of the test, and the loading and unloading of the motor rotor 14 is also more convenient, which can improve the test efficiency.

[0029] In another embodiment, combined Figure 1 and Figure 2 As shown, the base 1 has a guide groove 9 in the middle, and the guide groove 9 extends along the length direction of the base 1. The two ends of the guide groove 9 are respectively slidably connected to a slider 10, and the two brackets 2 are respectively fixed on the top of the slider 10.

[0030] In another embodiment, combined Figure 1 and Figure 2 As shown, a screw mechanism 11 is fixed to the left and right ends of the base 1 respectively, and the screws of the two screw mechanisms 11 are rotatably connected to the two sliders 10 respectively to ensure the displacement accuracy of the slider 10.

[0031] In another embodiment, combined Figure 1 and Figure 2 As shown, the bracket 3 includes two U-shaped supporting ends 12 and a "concave"-shaped frame body 13. The two supporting ends 12 are respectively located at the top of the two ends of the frame body 13, and the shafts at both ends of the motor rotor 14 are respectively mounted on the supporting ends 12.

[0032] In another embodiment, Figure 1 As shown, the middle portion of the base 1 further has a clearance groove 15 corresponding to the bracket 3 to allow space required for the bracket 3 to be raised or lowered.

[0033] In another embodiment, Figure 1 As shown, a cylinder 16 is fixed in the base 1 at the lower end of the avoidance groove 15 , and the piston rod of the cylinder 16 is connected to the middle part of the bottom end of the frame 13 .

[0034] In another embodiment, Figure 1 As shown, a guide rod 17 is fixed to both ends of the bottom of the frame 13, and the base 1 at the bottom of the avoidance groove 15 also has two guide holes corresponding to the two guide rods 17 to ensure the stability of the bracket 3 when lifting.

[0035] In another embodiment, Figure 3 As shown, the front end surface of the coupling ring 6 is located on the inner side of the guide ring 5 to ensure that the guide portion contacts the guide ring 5 first.

[0036] In another embodiment, Figure 1 As shown, the ends of the guide groove 9 at both ends of the avoidance groove 15 are also fixed with limiting blocks respectively to prevent the sliding groove from slipping out of the avoidance groove 15.

[0037] In another embodiment, Figure 1 As shown, the connecting portion 8 is fixed to the shaft of the motor rotor 14 by means of locking screws.

Claims

1. A high-efficiency and high-precision dynamic balancing machine for motor rotors, characterized by: It comprises a base (1), brackets (2) connected to both ends of the base (1) on the left and right sides, and a bracket (3) connected to the middle of the base (1) in a lifting manner; The bracket (2) has a through hole in the middle, and a bearing (4) is fixed to one end of the through hole facing the middle of the base (1). A mounting ring is fixed in the inner ring of the bearing (4), and a guide ring (5) and a coupling ring (6) are fixed in sequence in the mounting ring. The guide ring (5) is a trumpet-shaped permanent magnet guide ring, and a plurality of positioning platforms (7) are arrayed on the coupling ring (6). The cross section of each positioning platform (7) is obtuse-angled. The coupling rings (6) on the two brackets (2) are coaxially arranged. Connecting parts (8) corresponding to the bracket (2) are fixed to the shafts at both ends of the motor rotor (14), and the ends of the two connecting parts (8) respectively have a frustum-shaped guide part corresponding to the guide ring (5) and a coupling platform corresponding to the coupling ring (6), the guide part is a permanent magnet guide part, and the coupling platform has a positioning groove corresponding to the shape of each positioning platform (7); The motor rotor (14) is supported on the bracket (3), and the two brackets (2) are displaced toward the motor rotor (14) until the connecting portion (8) is matched with the guide ring (5) and the coupling ring (6). The guide portion and the guide ring (5) are combined under the action of magnetic attraction, and the coupling platform and the coupling ring (6) are matched.

2. A high-efficiency and high-precision dynamic balancing machine for motor rotors according to claim 1, characterized in that: The base (1) has a guide groove (9) in the middle, and the guide groove (9) extends along the length direction of the base (1). Both ends of the guide groove (9) are slidably connected to a slider (10), and the two brackets (2) are respectively fixed on the top of the slider (10).

3. A high-efficiency and high-precision dynamic balancing machine for motor rotors as claimed in claim 2, characterized in that: A screw mechanism (11) is fixed to the left and right ends of the base (1), respectively. The screws of the two screw mechanisms (11) are rotatably connected to the two sliders (10).

4. A high-efficiency and high-precision dynamic balancing machine for motor rotors as claimed in claim 3, characterized in that: The bracket (3) comprises two U-shaped supporting ends (12) and a frame body (13) in a concave shape. The two supporting ends (12) are respectively located at the top of both ends of the frame body (13), and the shafts at both ends of the motor rotor (14) are respectively mounted on the supporting ends (12).

5. A high-efficiency and high-precision dynamic balancing machine for motor rotors as claimed in claim 4, characterized in that: The middle portion of the base (1) also has a avoidance groove (15) corresponding to the bracket (3).

6. A high-efficiency and high-precision dynamic balancing machine for motor rotors as claimed in claim 5, characterized in that: A cylinder (16) is fixed in the base (1) at the lower end of the avoidance groove (15), and the piston rod of the cylinder (16) is connected to the middle part of the bottom end of the frame body (13).

7. A high-efficiency and high-precision dynamic balancing machine for motor rotors as claimed in claim 6, characterized in that: A guide rod (17) is fixed to each of the two ends of the bottom of the frame (13), and the base (1) at the bottom of the avoidance groove (15) is provided with two guide holes corresponding to the two guide rods (17).

8. The high-efficiency and high-precision dynamic balancing machine for motor rotors according to claim 7, characterized in that: The front end surface of the coupling ring (6) is located inside the guide ring (5).

9. The high-efficiency and high-precision dynamic balancing machine for motor rotors according to claim 8, characterized in that: Limiting blocks are also fixed to the ends of the guide grooves (9) at both ends of the avoidance groove (15).

10. The high-efficiency and high-precision dynamic balancing machine for motor rotors according to claim 9, characterized in that: The connecting portion (8) is fixed to the shaft of the motor rotor (14) via a locking screw.

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