Motor single-rotor overspeed test tooling

Abstract

The utility model provides a kind of motor single rotor overspeed test tool, including first support base, second support base, first support base is equipped with first bearing support seat, first bearing support seat is equipped with first containing groove, first bearing support seat is equipped with first bearing cover, the side of first bearing cover towards first bearing support seat is equipped with second containing groove, and first containing groove and second containing groove form first bearing containing groove;Second support base is equipped with second bearing support seat, and third containing groove is opened in second bearing support seat, and second bearing support seat is equipped with second bearing cover, the side of second bearing cover towards second bearing support seat is equipped with fourth containing groove, and third containing groove and fourth containing groove form second bearing containing groove;The both ends of motor single rotor are respectively located in first bearing containing groove and second bearing containing groove by bearing;So that motor single rotor can be separately experimented and complete overspeed test.

Description

Technical Field

[0001] This utility model relates to the field of rotor testing technology, specifically to a single rotor overspeed testing fixture for an electric motor. Background Technology

[0002] The primary purpose of motor overspeed testing is to verify the mechanical structural safety and reliability of the motor during overspeed operation. The test verifies the mechanical strength of the rotor structure and examines the performance of the motor rotor (especially the high-speed rotating parts) under extreme centrifugal forces. This includes checking for component breakage, deformation, or loosening; verifying design margins; assessing the reliability of the bearing system; checking for dynamic balancing issues; measuring vibration; and for DC motors, evaluating the secure binding of the non-woven tape at the winding ends. Many industry standards (such as IEC, TB, ISO, SAE, and various OEM standards) clearly stipulate the requirements and methods for overspeed testing of specific types of motors to ensure product compliance. Through overspeed testing, the end user is informed that the motor has sufficient safety margins even under overspeed conditions, preventing catastrophic mechanical disintegration and thus ensuring the safety of personnel and equipment.

[0003] Overspeed testing is a routine test for both AC and DC motors and is a mandatory test for products before they leave the factory. However, when customers purchase single-rotor motors as supplementary parts, this test cannot be performed because the complete machine is not provided. To meet customer needs and alleviate their concerns, this utility model provides a single-rotor motor overspeed testing fixture, addressing the inability to provide overspeed test performance parameters and information on whether there are any mechanical deformations or other mechanical strength hazards after the overspeed test for newly manufactured single-rotor motors. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a single rotor overspeed test fixture for motors that can perform overspeed tests on a single rotor.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A single rotor overspeed test fixture for an electric motor includes a first support base and a second support base. The first support base is provided with a first bearing support seat, the first bearing support seat is provided with a first receiving groove, the first bearing support seat is provided with a first bearing cover, and the first bearing cover is provided with a second receiving groove on the side facing the first bearing support seat. The first receiving groove and the second receiving groove form a first bearing receiving groove. The second support base is provided with a second bearing support seat, the second bearing support seat is provided with a third receiving groove, the second bearing support seat is provided with a second bearing cover, and the second bearing cover is provided with a fourth receiving groove on the side facing the second bearing support seat. The third receiving groove and the fourth receiving groove form the second bearing receiving groove. Both ends of the single rotor of the motor are located in the first bearing receiving groove and the second bearing receiving groove respectively through bearings.

[0006] In one embodiment, both the first bearing support and the second bearing support are semi-circular support seats; both the first bearing cover and the second bearing cover are semi-circular support covers.

[0007] In one embodiment, the first bearing support seat has a first arc-shaped notch, and the first receiving groove is formed within the first arc-shaped notch; the first bearing cover has a second arc-shaped notch on the side facing the first bearing support seat, and the second receiving groove is formed within the second arc-shaped notch; The second bearing support has a third arc-shaped notch, and the third receiving groove is disposed in the third arc-shaped notch; the second bearing cover has a fourth arc-shaped notch on the side facing the second bearing support, and the fourth receiving groove is disposed in the fourth arc-shaped notch.

[0008] In one embodiment, the first bearing support and the first bearing cover are fixedly connected by bolts to form a circular bearing support; the second bearing support and the second bearing cover are fixedly connected by bolts to form a circular bearing support.

[0009] In one embodiment, a first fixing block extends from both ends of the first bearing support, and a second fixing block extends from both ends of the first bearing cover; the first fixing block is fixedly connected to the second fixing block by bolts. A third fixing block extends from both ends of the second bearing support, and a fourth fixing block extends from both ends of the second bearing cover; the third fixing block is fixedly connected to the fourth fixing block by bolts.

[0010] In one embodiment, the first support base and the first bearing support are integrally formed; the second support base and the second bearing support are integrally formed.

[0011] In one embodiment, the first support base includes a first support base plate and a second support plate disposed on the first support base plate and perpendicular to the first support base plate. The second support base includes a second support base plate and a second support plate disposed on the second support base plate and perpendicular to the second support base plate.

[0012] In one embodiment, the first support base plate is provided with a first reinforcing plate perpendicular to both sides of the second support plate; the second support base is provided with a second reinforcing plate perpendicular to both sides of the second support plate.

[0013] In one embodiment, both the first support plate and the second support plate are trapezoidal support plates.

[0014] In one embodiment, the device further includes a coupling and a rotating motor fixedly connected to the coupling, wherein the end of the coupling opposite to the rotating motor is fixedly connected to a single rotor of the motor to be tested.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model features a symmetrically arranged first and second support bases. The first support base has a first bearing support seat with a first receiving groove and a first bearing cover. A second receiving groove is located on the side of the first bearing cover facing the first bearing support seat, forming a first bearing receiving groove. The second support base has a second bearing support seat with a third receiving groove and a second bearing cover. A fourth receiving groove is located on the side of the second bearing cover facing the second bearing support seat, forming a second bearing receiving groove. Both ends of the single rotor of the motor are located within the first and second bearing receiving grooves respectively via bearings. This allows the single rotor of the motor to be tested independently and to complete overspeed tests. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This utility model Figure 1 A structural schematic diagram of the first support base, the first bearing support seat, and the first bearing cover; Figure 3 This utility model Figure 1 A schematic diagram of the separate structure of the first bearing support and the first bearing cover; Figure 4 This utility model Figure 1 A top view of the first bearing support; Figure 5 This utility model Figure 1 A schematic diagram of the first bearing cover from below; Figure 6 This utility model Figure 1 A structural schematic diagram of the second support base, the first bearing support seat, and the first bearing cover; Figure 7 This utility model Figure 1 A schematic diagram of the separate structure of the second bearing support and the first bearing cover; Figure 8 This utility model Figure 1 A top view of the second bearing support structure; Figure 9 This utility model Figure 1 A schematic diagram of the second bearing cover from below.

[0017] In the diagram: 10. First support base, 11. First bearing support seat, 12. First receiving groove, 13. First bearing cover, 14. Second receiving groove, 16. First arc-shaped notch, 17. Second arc-shaped notch, 18. First fixing block, 19. Second fixing block, 20. Second support base, 21. Second bearing support seat, 22. Third receiving groove, 23. Second bearing cover, 24. Fourth receiving groove, 26. Third arc-shaped notch, 27. Fourth arc-shaped notch, 28. Third fixing block, 29. Fourth fixing block; 101. First supporting base plate, 102. First supporting plate, 103. First reinforcing plate, 201. Second supporting base plate, 202. Second supporting plate, 203. Second reinforcing plate. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example 1 like Figure 1 As shown, this embodiment includes a first support base 10 and a second support base 20. In this embodiment, the first support base 10 and the second support base 20 are symmetrically arranged to support the bearing structures at both ends of the single rotor of the motor.

[0020] like Figure 2-5 As shown, a first bearing support seat 11 is provided on the first support base 10, a first receiving groove 12 is provided on the first bearing support seat 11, a first bearing cover 13 is provided on the first bearing support seat 11, and a second receiving groove 14 is provided on the side of the first bearing cover 13 facing the first bearing support seat 11. The first receiving groove 12 and the second receiving groove 14 form the first bearing receiving groove. In this embodiment, the first bearing support seat 11 and the first bearing cover 13 are fixedly connected by bolts to form a circular bearing support seat. Thus, the cross-sectional shape of the first bearing receiving groove is circular, which is used to fix one end bearing of the single rotor of the motor.

[0021] like Figure 6-9As shown, a second bearing support 21 is provided on the second support base 20. A third receiving groove 22 is formed on the second bearing support 21. A second bearing cover 23 is provided on the second bearing support 21. A fourth receiving groove 24 is provided on the side of the second bearing cover 23 facing the second bearing support 21. The third receiving groove 22 and the fourth receiving groove 24 form the second bearing receiving groove. In this embodiment, the second bearing support 21 and the second bearing cover 23 are fixedly connected by bolts to form a circular bearing support. Therefore, the cross-sectional shape of the second bearing receiving groove is circular, used to fix the other end bearing of the single rotor of the motor. The first bearing receiving groove and the second bearing receiving groove have the same structure, both adopting a symmetrical design, which facilitates installation and disassembly, and improves the stability and reliability of the bearing support structure.

[0022] The first bearing receiving groove and the second bearing receiving groove are used to install the bearings at both ends of the single rotor of the motor. The first bearing cover 13 and the second bearing cover 23 are fixed to the first bearing support 11 and the second bearing support 21 respectively by bolts, so that the bearings are stable and do not shift in the groove.

[0023] Therefore, both ends of the single rotor of the motor are located in the first bearing receiving groove and the second bearing receiving groove respectively through bearings, thereby achieving stable support for the single rotor of the motor.

[0024] The first bearing support 11 and the second bearing support 21 are both semi-circular support seats; the first bearing cover 13 and the second bearing cover 23 are both semi-circular support covers. The first bearing cover 13 is fixedly connected to the first bearing support 11 by bolts to form a complete circular bearing support structure. Similarly, the second bearing cover 23 is also fixedly connected to the second bearing support 21 by bolts to form another complete circular bearing support structure. This structural design makes the bearing installation more stable and facilitates maintenance and replacement.

[0025] In this embodiment, a first arc-shaped notch 16 is provided on the first bearing support seat 11, and a first receiving groove 12 is provided inside the first arc-shaped notch 16; a second arc-shaped notch 17 is provided on the side of the first bearing cover 13 facing the first bearing support seat 11, and a second receiving groove 14 is provided inside the second arc-shaped notch 17; the second arc-shaped notch 17 and the first arc-shaped notch 16 are arranged opposite to each other, and the two together form a circular groove for fixing the outer ring of the bearing, thereby improving the positioning accuracy and stability of the bearing during operation.

[0026] The second bearing support 21 has a third arc-shaped notch 26, and the third receiving groove 22 is opened in the third arc-shaped notch 26; the second bearing cover 23 has a fourth arc-shaped notch 27 on the side facing the second bearing support 21, and the fourth receiving groove 24 is opened in the fourth arc-shaped notch 27; the fourth arc-shaped notch 27 and the third arc-shaped notch 26 are arranged opposite to each other, and the two together form another circular groove for fixing the outer ring of the bearing, which further enhances the positioning accuracy and support stability of the bearing during operation, thereby ensuring that the single rotor of the motor operates smoothly and reliably.

[0027] Both ends of the first bearing support 11 have first fixing blocks 18 extending from them, and both ends of the first bearing cover 13 have second fixing blocks 19 extending from them. The first fixing blocks 18 are fixedly connected to the second fixing blocks 19 by bolts. Both ends of the second bearing support 21 have third fixing blocks 28 extending from them, and both ends of the second bearing cover 23 have fourth fixing blocks 29 extending from them. The third fixing blocks 28 are fixedly connected to the fourth fixing blocks 29 by bolts. This makes the connection between the first bearing cover 13 and the first bearing support 11, and between the second bearing cover 23 and the second bearing support 21, more secure and reliable, while also facilitating disassembly and maintenance. The setting of each fixing block enhances the stability of the overall structure and effectively prevents loosening when subjected to vibration and impact, improving the safety and reliability of equipment operation.

[0028] In this embodiment, the first support base 10 and the first bearing support 11 are integrally formed; the second support base 20 and the second bearing support 21 are integrally formed; the overall strength and rigidity of the structure are further optimized, the risk of component deformation caused by vibration is reduced, and the impact of assembly errors on bearing alignment is reduced, thereby effectively improving the stability of the motor rotor when rotating at high speed.

[0029] The first support base 10 includes a first support base plate 101 and a first support plate 102 disposed on the first support base plate 101 and perpendicular to the first support base plate 101; the second support base 20 includes a second support base plate 201 and a second support plate 202 disposed on the second support base plate 201 and perpendicular to the second support base plate 201; the first support plate 102 and the second support plate 202 are respectively used to support and fix the corresponding first support base plate 101 and second support base plate 201, thereby ensuring the stability and load-bearing capacity of the overall structure.

[0030] The first support base plate 101 is provided with a first reinforcing plate 103 perpendicular to both sides of the first support plate 102; the second support base 20 is provided with a second reinforcing plate 203 perpendicular to both sides of the second support plate 202; the first reinforcing plate 103 and the second reinforcing plate 203 respectively enhance the structural strength of the first support base plate 101 and the second support base plate 201, effectively improving the bending resistance and load-bearing capacity of the overall support system, thereby further ensuring the stability and safety of the motor during high-intensity operation.

[0031] In this embodiment, both the first support plate 102 and the second support plate 202 are trapezoidal support plates. The trapezoidal structure design makes the support plate more evenly stressed when bearing load, and effectively disperses the stress from the bearing, thus improving the fatigue resistance of the support plate. The inclined surface of the trapezoidal support plate also facilitates installation and disassembly, enabling operators to complete related work more efficiently during maintenance.

[0032] In this embodiment, a coupling and a rotating motor fixedly connected to the coupling are also included. The end of the coupling opposite to the rotating motor is fixedly connected to the single rotor of the motor under test. The rotating motor provides power input to the single rotor of the motor under test, simulating its operating state under actual working conditions during the test. The coupling ensures the stability and efficiency of power transmission, while also possessing a certain compensation capability. It can effectively absorb minor deviations between the two connecting shafts, reduce vibration transmission, and improve test accuracy and equipment lifespan. The rotating motor smoothly transmits power to the single rotor of the motor under test through the coupling, enabling the single rotor to maintain good dynamic balance characteristics while rotating at high speed within the first and second bearing receiving grooves.

[0033] The test method of this application is as follows: First, the single rotor of the motor to be tested is installed in the first bearing receiving groove and the second bearing receiving groove, ensuring that the rotor axis is aligned with the center line of the support base; then, one end of the coupling is fixedly connected to the rotating motor, and the other end is connected to the single rotor of the motor to form a complete power transmission chain; start the rotating motor to drive the single rotor of the motor to rotate to the target speed, and run it continuously for a set time to simulate the actual working conditions; during this process, vibration data is measured, and after the test is stopped, other mechanical deformation data are measured.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A single-rotor overspeed testing fixture for an electric motor, characterized in that: Includes a first support base (10) and a second support base (20). The first support base (10) is provided with a first bearing support seat (11). The first bearing support seat (11) is provided with a first receiving groove (12). The first bearing support seat (11) is provided with a first bearing cover (13). The first bearing cover (13) is provided with a second receiving groove (14) on the side facing the first bearing support seat (11). The first receiving groove (12) and the second receiving groove (14) form a first bearing receiving groove. The second support base (20) is provided with a second bearing support seat (21), the second bearing support seat (21) is provided with a third receiving groove (22), the second bearing support seat (21) is provided with a second bearing cover (23), the second bearing cover (23) is provided with a fourth receiving groove (24) on the side facing the second bearing support seat (21), the third receiving groove (22) and the fourth receiving groove (24) form the second bearing receiving groove; Both ends of the single rotor of the motor are located in the first bearing receiving groove and the second bearing receiving groove respectively through bearings.

2. The single-rotor overspeed test fixture for electric motors according to claim 1, characterized in that: The first bearing support (11) and the second bearing support (21) are both semi-circular support seats; the first bearing cover (13) and the second bearing cover (23) are both semi-circular support covers.

3. The single-rotor overspeed test fixture for electric motors according to claim 2, characterized in that: The first bearing support (11) has a first arc-shaped notch (16), and the first receiving groove (12) is provided in the first arc-shaped notch (16); the first bearing cover (13) has a second arc-shaped notch (17) on the side facing the first bearing support (11), and the second receiving groove (14) is provided in the second arc-shaped notch (17); The second bearing support (21) has a third arc-shaped notch (26), and the third receiving groove (22) is located in the third arc-shaped notch (26); the second bearing cover (23) has a fourth arc-shaped notch (27) on the side facing the second bearing support (21), and the fourth receiving groove (24) is located in the fourth arc-shaped notch (27).

4. The single-rotor overspeed test fixture for electric motors according to claim 3, characterized in that: The first bearing support (11) and the first bearing cover (13) are fixedly connected by bolts to form a circular bearing support; the second bearing support (21) and the second bearing cover (23) are fixedly connected by bolts to form a circular bearing support.

5. The single-rotor overspeed test fixture for electric motors according to claim 4, characterized in that: Both ends of the first bearing support (11) are provided with first fixing blocks (18), and both ends of the first bearing cover (13) are provided with second fixing blocks (19). The first fixing blocks (18) are fixedly connected to the second fixing blocks (19) by bolts. Both ends of the second bearing support (21) are provided with third fixing blocks (28), and both ends of the second bearing cover (23) are provided with fourth fixing blocks (29). The third fixing blocks (28) are fixedly connected to the fourth fixing blocks (29) by bolts.

6. The single-rotor overspeed test fixture for electric motors according to claim 5, characterized in that: The first support base (10) and the first bearing support base (11) are integrally formed; the second support base (20) and the second bearing support base (21) are integrally formed.

7. The single-rotor overspeed test fixture for electric motors according to claim 6, characterized in that: The first support base (10) includes a first support base plate (101) and a first support plate (102) disposed on the first support base plate (101) and perpendicular to the first support base plate (101). The second support base (20) includes a second support base plate (201) and a second support plate (202) disposed on the second support base plate (201) and perpendicular to the second support base plate (201).

8. The single-rotor overspeed test fixture for electric motors according to claim 7, characterized in that: The first support base plate (101) is provided with a first reinforcing plate (103) perpendicular to both sides of the first support plate (102); the second support base (20) is provided with a second reinforcing plate (203) perpendicular to both sides of the second support plate (202).

9. The single-rotor overspeed test fixture for electric motors according to claim 8, characterized in that: Both the first support plate (102) and the second support plate (202) are trapezoidal support plates.

10. The single-rotor overspeed test fixture for electric motors according to claim 9, characterized in that: It also includes a coupling and a rotating motor fixedly connected to the coupling, wherein the end of the coupling opposite to the rotating motor is fixedly connected to a single rotor of the motor to be tested.

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