Three-phase alternating current motor noise suppression device

Abstract

The utility model relates to the technical field of three-phase alternating-current motor noise suppression, and discloses a three-phase alternating-current motor noise suppression device, which comprises a shell, two groups of support frames fixedly connected to the bottom of the shell, a stator iron core fixedly connected to the inner wall of the shell, and a rotor iron core movably connected to the inner wall of the stator iron core. A rotating shaft is inserted in the axis of the rotor core, the outer side of the rotating shaft is fixedly connected with a bearing inner ring, the steel balls roll in the first annular groove and the second annular groove, the steel balls periodically pass through oil outlet holes in an oil conveying pipe, and the oil conveying pipe is elastically supported by a spring due to the extrusion effect generated by rolling of the steel balls. The oil conveying pipe can slightly deform when being extruded, so that lubricating oil is allowed to flow out of the oil outlet hole, the surface of the steel ball is lubricated by the flowing lubricating oil due to rotation of the steel ball, in this way, the lubricating efficiency is greatly improved, timely and accurate supply of the lubricating oil is ensured, and noise generated by direct friction is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase AC motor noise suppression, in particular to a three-phase AC motor noise suppression device. Background Art

[0002] A three-phase AC motor is a rotating motor driven by three mutually balanced AC power sources and is a type of AC motor. A three-phase AC motor is mainly composed of components such as a stator, a rotor, and an end cover. The stator consists of three parts: an iron core, a winding, and a frame. The winding is the circuit part of the motor, and a rotating magnetic field is generated when three-phase AC is applied. The rotor consists of a rotating shaft, an iron core, and a rotor winding (or conductor bar, copper rod). The rotor winding cuts the magnetic lines of force in the rotating magnetic field to generate an induced electromotive force and current, thereby generating an electromagnetic torque to drive the motor to rotate.

[0003] According to Chinese patent publication CN202121077404.2, in this application, a sound-damping liner is provided in an existing housing, and the sound-damping liner is supported in the housing by surrounding support strips. When noise occurs, the sound waves are transmitted to the sound-absorbing cotton on the sound-damping liner, and the sound wave energy is converted into heat energy in the sound-absorbing cotton, causing the entire sound-damping liner to vibrate under the support of the support strips, thereby offsetting part of the sound wave energy, reducing the generation of heat energy in the sound-absorbing cotton, and extending the life of the sound-absorbing cotton;

[0004] Although the sound-suppressing liner in the application can effectively address the problem of low life of the sound-absorbing cotton, during the operation of the motor, the lack of lubrication of the bearings will cause direct contact between the internal components of the bearings, increasing friction. This increased friction will generate more noise. For this reason, we propose a three-phase AC motor noise suppression device. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a three-phase AC motor noise suppression device to solve the above-mentioned problems.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a three-phase AC motor noise suppression device, comprising a housing, a support frame, a rotating shaft, a stator core, a rotor core, and a bearing inner ring, wherein the bottom of the housing is fixedly connected to two sets of support frames, the inner wall of the housing is fixedly connected to the stator core, the inner wall of the stator core is movably connected to the rotor core, the rotating shaft is inserted into the axis of the rotor core, and the outer side of the rotating shaft is fixedly connected to the bearing inner ring, and further comprising:

[0009] The extrusion lubrication structure is arranged on the outer side of the bearing inner ring, and is used to lubricate the outer side of the bearing inner ring.

[0010] Preferably, a second annular groove is provided on the outer side of the bearing inner ring, and a steel ball is clamped on the inner wall of the second annular groove.

[0011] Preferably, the outer side of the steel ball is movably connected to the outer ring of the bearing, the inner wall of the outer ring of the bearing is provided with a first annular groove, and the inner wall of the first annular groove is clamped together with the outer side of the steel ball.

[0012] Preferably, a placement groove is provided on the inner wall of the first annular groove, a storage container is clamped on the inner wall of the placement groove, an arc-shaped groove is provided on one side of the storage container, and the curvature of the arc-shaped groove is adapted to the curvature of the first annular groove.

[0013] Preferably, the extrusion lubrication structure includes an oil pipe and oil outlet holes. The oil pipe is fixedly connected to the outer side of the bottom of the reservoir, and one side of the oil pipe is clamped together with the inner wall of the first annular groove. Eight groups of oil outlet holes are opened on the side of the oil pipe close to the second annular groove, and one side of the oil pipe is movably connected to the outer side of the steel ball.

[0014] Preferably, four groups of springs are fixedly connected to the inner wall of the first annular groove, and the other ends of the four groups of springs are fixedly connected to the outer side of the oil pipeline.

[0015] Preferably, a bearing cover is clamped on the outer side of the rotating shaft at a position corresponding to the outer side of the bearing inner ring, a front end cover is clamped on the outer side of the bearing cover, and one side of the front end cover is clamped together with one end of the outer shell.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a three-phase AC motor noise suppression device with the following beneficial effects:

[0018] 1. The three-phase AC motor noise suppression device uses an extrusion lubrication structure. As the steel balls roll in the first and second annular grooves, they periodically pass through the oil outlet holes on the oil pipe. Due to the extrusion effect generated by the rolling of the steel balls and the elastic support of the spring on the oil pipe, the oil pipe can undergo slight deformation when squeezed, thereby allowing lubricating oil to flow out of the oil outlet holes. The outflowing lubricating oil will lubricate the surface of the steel balls due to the rotation of the steel balls. This method greatly improves lubrication efficiency, ensures the timely and accurate supply of lubricating oil, and greatly reduces noise generated by direct friction.

[0019] 2. This three-phase AC motor noise suppression device continuously lubricates and reduces friction and wear between the bearing inner ring, steel balls, and outer ring, lowering operating temperature and noise, thereby significantly extending the bearing's service life. This is of great significance for improving the overall reliability of the motor and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of the utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the lubrication structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the disassembly of the lubrication structure of the utility model.

[0024] In the figure: 1. Housing; 2. Support frame; 3. Front cover; 4. Rotating shaft; 5. Bearing cover; 6. Stator core; 7. Rotor core; 8. Bearing outer ring; 9. Steel ball; 10. Bearing inner ring; 11. First annular groove; 12. Second annular groove; 13. Oil pipe; 14. Oil outlet; 15. Spring; 16. Placement groove; 17. Reservoir; 18. Arc groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-4 A three-phase AC motor noise suppression device includes a housing 1, a support frame 2, a rotating shaft 4, a stator core 6, a rotor core 7, and a bearing inner ring 10. The bottom of the housing 1 is fixedly connected to two sets of support frames 2, the inner wall of the housing 1 is fixedly connected to the stator core 6, the inner wall of the stator core 6 is movably connected to the rotor core 7, the rotating shaft 4 is inserted into the axis of the rotor core 7, and the outer side of the rotating shaft 4 is fixedly connected to the bearing inner ring 10. The device also includes:

[0027] The extrusion lubrication structure is provided on the outer side of the bearing inner ring 10 , and is used to lubricate the outer side of the bearing inner ring 10 .

[0028] Furthermore, a second annular groove 12 is provided on the outer side of the bearing inner ring 10, and a steel ball 9 is clamped on the inner wall of the second annular groove 12. This relative movement causes the steel ball 9 to roll in the first annular groove 11 and the second annular groove 12, and generates a certain extrusion force.

[0029] Furthermore, the outer side of the steel ball 9 is movably connected to the bearing outer ring 8, and the inner wall of the bearing outer ring 8 is provided with a first annular groove 11. The inner wall of the first annular groove 11 is clamped together with the outer side of the steel ball 9. When the motor starts running, the rotating shaft 4 drives the bearing inner ring 10 to rotate, and then generates relative motion through the steel ball 9 and the bearing outer ring 8.

[0030] Furthermore, a placement groove 16 is provided on the inner wall of the first annular groove 11, and a reservoir 17 is clamped on the inner wall of the placement groove 16. An arc groove 18 is provided on one side of the reservoir 17, and the curvature of the arc groove 18 is adapted to the curvature of the first annular groove 11. When the motor is not running, the lubricating oil is stored in the reservoir 17 and connected to the first annular groove 11 through the oil pipe 13, but does not flow out directly.

[0031] Furthermore, the extrusion lubrication structure includes an oil pipe 13 and an oil outlet hole 14. The oil pipe 13 is fixedly connected to the outer side of the bottom of the reservoir 17, and one side of the oil pipe 13 is clamped together with the inner wall of the first annular groove 11. Eight groups of oil outlet holes 14 are opened on the side of the oil pipe 13 close to the second annular groove 12. One side of the oil pipe 13 is movably connected to the outer side of the steel ball 9. As the steel ball 9 rolls and squeezes, they will periodically pass through the position of the oil pipe 13 and the oil outlet hole 14. Due to the squeezing effect of the steel ball, the lubricating oil in the oil pipe 13 is squeezed out through the oil outlet hole 14 when under pressure, so that the surface of the steel ball 9 is lubricated. As the motor continues to run, this lubrication process will be repeated to ensure that there is always sufficient lubrication between the bearing inner ring 10 and the steel ball 9, reducing friction and wear.

[0032] Furthermore, four groups of springs 15 are fixedly connected to the inner wall of the first annular groove 11, and the other ends of the four groups of springs 15 are fixedly connected to the outside of the oil pipe 13. The springs 15 play the role of fixing the oil pipe 13 and can also compensate for the distance between the oil pipe 13 and the steel ball 9. When the oil in the oil pipe 13 becomes less, the oil pipe 13 will become deflated, so that the steel ball 9 cannot squeeze the oil pipe 13. The springs 1, 5 can squeeze the deflated oil pipe 13 to the outside of the steel ball 9.

[0033] Furthermore, a bearing cover 5 is clamped on the outer side of the rotating shaft 4 at a position corresponding to the outer side of the bearing inner ring 10 , and a front end cover 3 is clamped on the outer side of the bearing cover 5 . One side of the front end cover 3 is clamped together with one end of the housing 1 .

[0034] Working principle:

[0035] The inner ring 10 of the bearing is mounted on the rotating shaft 4 and forms rolling contact with the outer ring 8 of the bearing via the steel balls 9. The inner wall of the outer ring 8 of the bearing is provided with a first annular groove 11, into which the steel balls 9 are embedded. These steel balls 9 also roll in the second annular groove 12 of the inner ring 10 of the bearing. The first annular groove 11 also has a placement groove 16 for mounting a reservoir 17 for storing lubricating oil. The reservoir 17 is connected to the first annular groove 11 via an oil pipe 13, which is provided with multiple oil outlet holes 14, which face the second annular groove 12. The oil pipe 13 is connected to the inner wall of the first annular groove 11 via four sets of springs 15 to maintain a certain degree of elasticity and stability.

[0036] Static state: When the motor is not running, the lubricating oil is stored in the reservoir 17 and connected to the first annular groove 11 through the oil pipe 13, but does not flow out directly. When the motor starts to run, the rotating shaft 4 drives the inner ring 10 of the bearing to rotate, and then generates relative motion with the outer ring 8 of the bearing through the steel balls 9. This relative motion causes the steel balls 9 to roll in the first annular groove 11 and the second annular groove 12, and generates a certain extrusion pressure. As the steel balls 9 roll in the first annular groove 11 and the second annular groove 12, they will periodically pass through the oil outlet 14 on the oil pipe 13. Due to the extrusion effect generated by the rolling of the steel balls 9 and the elastic support of the spring 15 on the oil pipe 13, the oil pipe 13 can undergo a slight deformation when squeezed, thereby allowing the lubricating oil to flow out from the oil outlet 14. The outflowing lubricating oil will lubricate the surface of the steel balls 9 due to the rotation of the steel balls 9. As the motor continues to run, this lubrication process will be repeated continuously to ensure that there is always sufficient lubrication between the inner ring 10 of the bearing and the steel balls 9, reducing friction and wear.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase AC motor noise suppression device, comprising a housing (1), a support frame (2), a rotating shaft (4), a stator core (6), a rotor core (7) and a bearing inner ring (10), wherein the bottom of the housing (1) is fixedly connected to two groups of support frames (2), the inner wall of the housing (1) is fixedly connected to the stator core (6), the inner wall of the stator core (6) is movably connected to the rotor core (7), the axis of the rotor core (7) is plugged with the rotating shaft (4), and the outer side of the rotating shaft (4) is fixedly connected to the bearing inner ring (10), characterized in that: Also includes: An extrusion lubrication structure is arranged on the outside of a bearing inner ring (10), and is used to lubricate the outside of the bearing inner ring (10).

2. The three-phase AC motor noise suppression device according to claim 1, characterized in that: A second annular groove (12) is provided on the outer side of the bearing inner ring (10), and a steel ball (9) is clamped on the inner wall of the second annular groove (12).

3. The three-phase AC motor noise suppression device according to claim 2, characterized in that: The outer side of the steel ball (9) is movably connected to the bearing outer ring (8), and the inner wall of the bearing outer ring (8) is provided with a first annular groove (11), and the inner wall of the first annular groove (11) is clamped together with the outer side of the steel ball (9).

4. The three-phase AC motor noise suppression device according to claim 3, characterized in that: The inner wall of the first annular groove (11) is provided with a placement groove (16), the inner wall of the placement groove (16) is clamped with a storage device (17), and one side of the storage device (17) is provided with an arc-shaped groove (18), and the curvature of the arc-shaped groove (18) is adapted to the curvature of the first annular groove (11).

5. The three-phase AC motor noise suppression device according to claim 4, characterized in that: The extrusion lubrication structure comprises an oil delivery pipe (13) and oil outlet holes (14); the outer side of the bottom of the reservoir (17) is fixedly connected to the oil delivery pipe (13), and one side of the oil delivery pipe (13) is clamped together with the inner wall of the first annular groove (11); eight groups of oil outlet holes (14) are opened on the side of the oil delivery pipe (13) close to the second annular groove (12); and one side of the oil delivery pipe (13) is movably connected to the outer side of the steel ball (9).

6. The three-phase AC motor noise suppression device according to claim 5, characterized in that: Four groups of springs (15) are fixedly connected to the inner wall of the first annular groove (11), and the other ends of the four groups of springs (15) are fixedly connected to the outer side of the oil delivery pipe (13).

7. The three-phase AC motor noise suppression device according to claim 1, characterized in that: A bearing cover (5) is clamped on the outer side of the rotating shaft (4) at a position corresponding to the outer side of the bearing inner ring (10), a front end cover (3) is clamped on the outer side of the bearing cover (5), and one side of the front end cover (3) is clamped together with one end of the housing (1).

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