Special insulating bearing sleeve structure

Abstract

The utility model discloses a special insulating bearing sleeve structure in the technical field of insulating bearing sleeves, which comprises a main shaft of a motor, a bearing is sleeved on the outer ring of the main shaft, a bearing sleeve is sleeved on the outer wall of the bearing, an annular notch is arranged on the outer wall of the bearing sleeve, and a circular ring is thermally sleeved at the annular notch. An insulating washer is arranged between the circular ring and the side face of the annular notch, an insulating annular plate is arranged between the circular ring and the bottom face of the annular notch, and epoxy resin is further arranged between the bearing and the bearing sleeve and located on the side, away from the insulating washer, of the insulating annular plate. The insulating washer, the insulating ring plate and the epoxy resin jointly form an insulating layer and increase the creepage distance, so that a special insulating bearing sleeve structure is formed; the outer ring of the circular ring is sleeved with an annular motor end cover, the insulating gasket is located between the motor end cover and the side face of the annular notch, and the motor end cover and the bearing sleeve are fixedly connected through bolts.

Description

Technical Field

[0001] The utility model relates to the technical field of insulating bearing sleeves, in particular to a special insulating bearing sleeve structure. Background Art

[0002] Insulated bearings in motors can block the shaft current generated by the motor from forming a circuit, protecting the bearings from electrical corrosion and extending their service life. While insulated bearings are several times more expensive than ordinary bearings, insulated bearing sleeves offer a low-cost structure and are easy to install and replace.

[0003] The currently widely used insulating bearing sleeve structure divides the bearing sleeve into two parts, an inner and outer ring, with insulating material filled in the middle to form an insulating layer. This insulating structure cannot withstand axial force and is less effective on vertical motors and motors that need to withstand axial force. The force will cause the insulating bearing sleeve to be misaligned, affecting the insulation effect and even the normal operation of the motor, and ultimately causing an accident. Utility Model Content

[0004] The purpose of the present utility model is to provide a special insulating bearing sleeve structure to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A special insulating bearing sleeve structure includes a main shaft of a motor, an outer ring of the main shaft is provided with a bearing, an outer wall of the bearing is provided with a bearing sleeve, an outer wall of the bearing sleeve is provided with an annular notch, a circular ring is thermally fitted on the annular notch, an insulating washer is provided between the circular ring and the side of the annular notch, an insulating ring plate is provided between the circular ring and the bottom surface of the annular notch, an epoxy resin is further provided between the bearing and the bearing sleeve, the epoxy resin is located on the side of the insulating ring plate away from the insulating washer, the insulating washer, the insulating ring plate and the epoxy resin together form an insulating layer and increase the creepage distance, thereby forming a special insulating bearing sleeve structure; the outer ring of the circular ring is provided with an annular motor end cover, the insulating washer is located between the motor end cover and the side of the annular notch, and the motor end cover and the bearing sleeve are fixedly connected by bolts.

[0007] As a further solution of the present invention: the insulating washer is an annular structure and is sleeved on the side of the annular gap. The insulating washer and the annular gap have the same height to avoid direct contact between the ring and the bearing sleeve.

[0008] As a further solution of the present invention: the insulating ring plate is an annular structure and is sleeved on the bottom surface of the annular notch to avoid direct contact between the ring and the bearing sleeve.

[0009] As a further solution of the present invention: a first groove is provided on one side of the inner ring, a second groove is provided on one side of the outer wall of the bearing sleeve, the first groove and the second groove correspond to each other, and the epoxy resin is filled in the first groove and the second groove.

[0010] As a further solution of the present invention: a slope is provided on the side of the circular ring close to the insulating washer.

[0011] As a further solution of the present invention: the bolt passes through the motor end cover, the insulating washer and the bearing sleeve, the outer wall of the contact part between the bolt and the motor end cover is provided with an insulating sleeve, the bolt and the side of the motor end cover are provided with an insulating gasket, and the insulating sleeve and the insulating gasket together form an insulating layer.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The insulating washer and the insulating ring plate in the utility model can completely insulate and separate the circular ring from the bearing sleeve without any contact, thereby achieving a good insulation effect and being able to withstand axial forces to a certain extent.

[0014] The special insulating bearing sleeve structure in the utility model can withstand axial force, and has obvious effects on vertical motors and motors that need to withstand axial force. The insulating bearing sleeve will not be dislocated due to the axial force, and the insulation effect is maintained to maintain the normal operation of the motor. This insulating bearing sleeve has a simple structure, low cost, easy production and high reliability. It solves the problem that conventional insulating bearing sleeves cannot withstand axial force. It can be used on vertical motors and motors with tilt angles to meet more application scenarios.

[0015] In the utility model, the bolts fix the motor end cover and the bearing sleeve together, which can better withstand the axial force; the insulating washer can isolate the motor end cover and the bearing sleeve to form an insulation effect and maintain the normal operation of the motor.

[0016] In the utility model, the insulating gasket and the insulating sleeve together form an insulating layer, which can completely separate the bolt from the motor end cover without contact, achieve a good insulation effect, and can withstand axial force to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0019] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 4 for Figure 3Enlarged view of point B in the middle.

[0021] In the figure: 1. Main shaft; 2. Bearing; 3. Bearing sleeve; 4. Ring; 5. Motor end cover; 6. Insulating washer; 7. Insulating ring plate; 8. Epoxy resin; 9. Insulating sleeve; 10. Insulating spacer; 11. Bolt; 12. First groove; 13. Second groove; 14. Inclined surface; 15. Annular notch. DETAILED DESCRIPTION

[0022] 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.

[0023] Example

[0024] A special insulating bearing sleeve structure, reference Figures 1-4 , including the main shaft 1 of the motor, the outer ring of the main shaft 1 is provided with a bearing 2, the outer wall of the bearing 2 is provided with a bearing sleeve 3, the outer wall of the bearing sleeve 3 is provided with an annular gap 15, and a ring 4 is thermally fitted on the annular gap 15; the effects achieved by the above components are: the setting of the annular gap 15 provides an installation space for the ring 4, which is convenient for installing the ring 4 on the bearing sleeve 3; after heating, the ring 4 is fitted on the bearing sleeve 3 and installed tightly.

[0025] like Figures 1-4 As shown, in this embodiment: an insulating washer 6 is provided between the circular ring 4 and the side of the annular notch 15. The insulating washer 6 is an annular structure and is sleeved on the side of the annular notch 15. The insulating washer 6 has the same height as the annular notch 15 to avoid direct contact between the circular ring 4 and the bearing sleeve 3. The effect achieved by the above components is: the insulating washer 6 can completely insulate and separate the side of the circular ring 4 from the bearing sleeve 3, without contact, to achieve a good insulation effect, and can withstand axial force to a certain extent.

[0026] like Figures 1-4 As shown, in this embodiment: an insulating ring plate 7 is provided between the circular ring 4 and the bottom surface of the annular notch 15. The insulating ring plate 7 is an annular structure and is sleeved on the bottom surface of the annular notch 15 to prevent the circular ring 4 from directly contacting the bearing sleeve 3. The effect achieved by the above components is: the insulating ring plate 7 can completely insulate and separate the inner ring of the circular ring 4 from the outer ring of the bearing sleeve 3, without contact, thereby achieving a good insulation effect and being able to withstand axial force to a certain extent.

[0027] like Figures 1-4As shown, in this embodiment: epoxy resin 8 is also provided between the bearing 2 and the bearing sleeve 3, and the epoxy resin 8 is located on the side of the insulating ring plate 7 away from the insulating gasket 6. A first groove 12 is provided on the inner ring side of the ring 4, and a second groove 13 is provided on the outer wall side of the bearing sleeve 3. The first groove 12 and the second groove 13 correspond to each other, and the epoxy resin 8 is filled in the first groove 12 and the second groove 13; the effect achieved by the above components is: the first groove 12 and the second groove 13 correspond to each other, which not only provides space for the epoxy resin 8, but also effectively increases the creepage distance, while ensuring the insulation effect of the injected epoxy resin 8; the epoxy resin 8 increases the tightness of the connection between the bearing 2 and the bearing sleeve 3, can withstand axial force to a certain extent, maintain the insulation effect, and maintain the normal operation of the motor.

[0028] like Figures 1-4 As shown, in this embodiment: a bevel 14 is provided on the side of the ring 4 close to the insulating washer 6; the effect achieved by the above components is: the bevel 14 is provided on the side of the ring 4 close to the bearing sleeve 3, and when the ring 4 is fitted onto the bearing sleeve 3, it can be fitted into place, effectively ensuring the insulation effect.

[0029] like Figures 1-4 As shown, in this embodiment: the insulating gasket 6, the insulating ring plate 7 and the epoxy resin 8 together form an insulating layer and increase the creepage distance, thereby forming a special insulating bearing sleeve structure; the effects achieved by the above components are: the above special insulating bearing sleeve structure can withstand axial force, and has obvious effects on vertical motors and motors that need to withstand axial force. The insulating bearing sleeve will not be misaligned due to the axial force, and the insulation effect is maintained to maintain the normal operation of the motor; this type of insulating bearing sleeve has a simple structure, low cost, easy production, and high reliability. It solves the problem that conventional insulating bearing sleeves cannot withstand axial force, and can be used on vertical motors and motors with tilt angles to meet more application scenarios.

[0030] like Figures 1-4 As shown, in this embodiment: the outer ring 4 is provided with an annular motor end cover 5, the insulating washer 6 is located between the motor end cover 5 and the side of the annular notch 15, and the motor end cover 5 and the bearing sleeve 3 are fixedly connected by bolts 11; the effects achieved by the above components are: the bolts 11 fix the motor end cover 5 and the bearing sleeve 3 together, which can better withstand axial force; the insulating washer 6 can isolate the motor end cover 5 from the bearing sleeve 3, forming an insulation effect, and maintaining the normal operation of the motor.

[0031] like Figures 1-4As shown, in this embodiment: the bolt 11 passes through the motor end cover 5, the insulating washer 6 and the bearing sleeve 3, the outer wall of the contact part of the bolt 11 and the motor end cover 5 is provided with an insulating sleeve 9, and the side of the bolt 11 and the motor end cover 5 is provided with an insulating gasket 10, and the insulating sleeve 9 and the insulating gasket 10 together form an insulating layer; the effect achieved by the above components is: the insulating gasket 10 and the insulating sleeve 9 together form an insulating layer, which can completely separate the bolt 11 from the motor end cover 5 without contact, achieve good insulation effect, and be able to withstand axial force to a certain extent.

[0032] The operating principle of the present utility model is as follows: first, the insulating washer 6 is put on the side of the annular gap 15, then the insulating ring plate 7 is put on the bottom surface of the annular gap 15, and the internal gap is filled with epoxy glue, then the bearing sleeve 3 is heated and put into the annular gap 15, ensuring that the insulating ring plate 7 is located on the inner ring of the bearing sleeve 3 and the insulating washer 6 is located on the side of the bearing sleeve 3. At this time, the first groove 12 and the second groove 13 correspond, the epoxy resin 8 is injected and fills the first groove 12 and the second groove 13, then, the bearing 2 is put on the outer ring of the main shaft 1 of the motor, then, the bolt 11 is passed through the insulating gasket 10 and the insulating sleeve 9, and then passed through the motor end cover 5, the insulating washer 6 and the bearing sleeve 3 in turn, ensuring that the insulating gasket 10 is located between the bolt 11 and the outer wall of the contact part of the motor end cover 5, and the insulating sleeve 9 is located between the bolt 11 and the outer wall of the contact part of the motor end cover 5, and the motor end cover 5 and the bearing sleeve 3 are fixedly connected.

[0033] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A special insulating bearing sleeve structure, comprising a main shaft (1) of a motor, characterized in that: The outer ring of the main shaft (1) is provided with a bearing (2), the outer wall of the bearing (2) is provided with a bearing sleeve (3), the outer wall of the bearing sleeve (3) is provided with an annular notch (15), a circular ring (4) is thermally sleeved on the circular notch (15), an insulating washer (6) is provided between the circular ring (4) and the side of the circular notch (15), an insulating ring plate (7) is provided between the circular ring (4) and the bottom surface of the circular notch (15), and an epoxy resin (8) is further provided between the bearing (2) and the bearing sleeve (3), the epoxy resin (8) is located on the side of the insulating ring plate (7) away from the insulating washer (6), the insulating washer (6), the insulating ring plate (7) and the epoxy resin (8) together form an insulating layer and increase the creepage distance, thereby forming a special insulating bearing sleeve structure; The outer ring of the circular ring (4) is provided with an annular motor end cover (5), the insulating washer (6) is located between the motor end cover (5) and the side of the annular notch (15), and the motor end cover (5) and the bearing sleeve (3) are fixedly connected by bolts (11).

2. A special insulating bearing sleeve structure according to claim 1, characterized in that: The insulating washer (6) is an annular structure and is sleeved on the side of the annular notch (15). The insulating washer (6) and the annular notch (15) are at the same height to avoid direct contact between the ring (4) and the bearing sleeve (3).

3. A special insulating bearing sleeve structure according to claim 2, characterized in that: The insulating ring plate (7) is an annular structure and is sleeved on the bottom surface of the annular notch (15) to prevent the circular ring (4) from directly contacting the bearing sleeve (3).

4. The special insulating bearing sleeve structure according to claim 3 is characterized in that: A first groove (12) is provided on one side of the inner ring of the circular ring (4), and a second groove (13) is provided on one side of the outer wall of the bearing sleeve (3). The first groove (12) and the second groove (13) correspond to each other, and the epoxy resin (8) is filled in the first groove (12) and the second groove (13).

5. The special insulating bearing sleeve structure according to claim 4 is characterized in that: The side surface of the circular ring (4) close to the insulating washer (6) is provided with an inclined surface (14).

6. The special insulating bearing sleeve structure according to claim 5, characterized in that: The bolt (11) passes through the motor end cover (5), the insulating washer (6) and the bearing sleeve (3); the outer wall of the contact portion between the bolt (11) and the motor end cover (5) is provided with an insulating sleeve (9); the side surfaces of the bolt (11) and the motor end cover (5) are provided with an insulating gasket (10); the insulating sleeve (9) and the insulating gasket (10) together form an insulating layer.

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