Bearing sealing ring and sealed deep groove ball conductive bearing

Abstract

The utility model relates to a bearing seal ring and sealed deep groove ball conductive bearing, including seal ring body, the seal ring body includes framework and the seal main body that wraps outside the framework, the both ends of seal main body abut against and seal between bearing outer ring and bearing inner ring, the seal main body is conductive seal main body. According to the technical scheme, the sealing ring body comprises the framework and the sealing main body wrapping the outer side of the framework, the framework is arranged in the sealing main body and serves as a support of the sealing main body, and the strength of the whole sealing ring body can be improved. The two ends of the sealing body abut against and are sealed between the bearing outer ring and the bearing inner ring, and therefore the bearing outer ring and the bearing inner ring are connected together to form contact type sealing. And moreover, the sealing main body is a conductive sealing main body, so that charge circulation can be discharged and conducted between the bearing outer ring and the bearing inner ring through the conductive sealing main body, the shaft voltage is reduced, the current passing through the bearing is very small, the voltage breakdown risk is reduced, and the bearing is effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a bearing seal ring and a sealed deep groove ball conductive bearing. Background Art

[0002] The potential difference generated between the two ends of the rotating shaft or between the shaft and the bearing during the operation of the motor is called the shaft voltage. If the two ends of the shaft form a loop through the motor frame, etc., but when the shaft voltage is relatively high, or the oil film has not been stably formed at the moment of motor startup, the shaft voltage will cause the lubricating oil film to discharge and break down to form a loop to generate shaft current. The high temperature generated by the partial discharge energy of the shaft current can melt many small areas on the inner ring, outer ring or rolling balls of the bearing, damage the working surface of the bearing, and cause safety accidents.

[0003] The structure of the sealing ring rubber on the conventional bearing is non-contact sealing, and the commonly used sealing materials are nitrile rubber or hydrogenated nitrile rubber, both of which are insulating materials and have no conductive function. Summary of the Invention

[0004] In order to solve the above problems, the first object of the utility model is to provide a bearing seal ring, which can be sealed and abutted between the bearing outer ring and the bearing inner ring, and the sealing main body is a conductive sealing main body, so as to form a low-resistance bypass, so that charges can be discharged through this increased bypass, reduce the shaft voltage, and then reduce the current passing through the bearing, reduce the risk of voltage breakdown, and effectively protect the bearing; the second object of the utility model is to provide a sealed deep groove ball conductive bearing with the above-mentioned bearing seal ring.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions:

[0006] A bearing seal ring includes a seal ring body, and is characterized in that: the seal ring body includes a skeleton and a sealing main body coated on the outer side of the skeleton, both ends of the sealing main body are sealed and abutted between the bearing outer ring and the bearing inner ring, and the sealing main body is a conductive sealing main body; the conductive sealing main body includes a main body part, and outer lips and inner lips formed on both sides of the main body part, the outer lips are matched with the bearing outer ring for sealing, and the inner lips at least include groove lips for cooperating with the bearing inner ring for sealing; the inner lips further include outer retaining lips formed on the outer side of the groove lips, and the outer retaining lips are pressed and abutted against the side wall of the bearing inner ring; a second accommodation groove is formed by enclosing between the inner lips, the outer retaining lips and the main body part.

[0007] In the above technical solution, the sealing ring body includes a skeleton and a sealing main body covering the outside of the skeleton. The skeleton is arranged inside the sealing main body as a support for the sealing main body, which can increase the strength of the entire sealing ring body. Both ends of the sealing main body are abutted and sealed between the outer ring and the inner ring of the bearing, so as to connect the outer ring and the inner ring of the bearing together to form a contact seal. Moreover, the sealing main body is a conductive sealing main body, so that charges can flow and be discharged between the outer ring and the inner ring of the bearing through this conductive sealing main body, reducing the shaft voltage. Furthermore, the current passing through the bearing will be very small, reducing the risk of voltage breakdown and effectively protecting the bearing. It should be noted here that the conductive sealing main body is nitrile rubber added with carbon black.

[0008] The outer lip of the conductive sealing main body is matched with the outer ring of the bearing for sealing, and the groove lip of the inner lip is matched with the inner ring of the bearing for sealing, so that the conductive sealing main body becomes a low-resistance bypass connecting the outer ring and the inner ring of the bearing, and charges can flow through the outer lip, the main body part, and the groove lip. In addition, the conductive sealing main body plays a good sealing role, which can keep the inside of the bearing rotating cavity clean and improve the service life of the bearing. The setting of the outer retaining lip enables charges to also flow from the outer retaining lip, further improving the charge discharge effect, quickly reducing the shaft voltage, and better protecting the bearing. Moreover, the sealing effect is further improved to keep the inside of the bearing clean. The setting of the second accommodating groove improves the structural toughness of the outer retaining part, facilitates extrusion deformation, and at the same time can increase the impurity content of the sealing ring body and delay the accumulation of impurities.

[0009] Preferably, the inner lip further includes an inner retaining lip formed on the inner side of the groove lip, and the inner retaining lip is tightly abutted against the side wall of the inner ring of the bearing. In this technical solution, the setting of the inner retaining lip enables charges to also flow from the inner retaining lip, further improving the charge discharge effect, more quickly reducing the shaft voltage, and better protecting the bearing. Moreover, the inner retaining lip can prevent a large amount of lubricating medium from impacting the groove lip and maintain the structural stability of the inner lip.

[0010] Preferably, a first accommodating groove is formed between the upper end of the outer lip and the main body part. In this technical solution, the setting of the first accommodating groove improves the structural toughness of the outer lip, facilitates extrusion deformation, and at the same time can increase the impurity content of the sealing ring body and delay the accumulation of impurities.

[0011] Preferably, the skeleton includes a main bone part, and straight bone parts and inclined bone parts formed at both ends of the main bone part. The straight bone parts extend outward and approach the end face of the outer lip, and the inclined bone parts extend outward and approach the end face of the inner retaining lip. In this technical solution, the extension of the straight bone parts and the inclined bone parts can improve the strength of the outer lip and the inner lip and play a good supporting role.

[0012] A sealed deep groove ball conductive bearing includes an outer bearing ring, an inner bearing ring, and a bearing cage disposed between the outer bearing ring and the inner bearing ring. Rollers are installed on the bearing cage. It is characterized in that: it also includes a bearing seal ring as described in any one of the above. At least one group of the bearing seal rings is axially sealed between the outer bearing ring and the inner bearing ring. First assembly grooves are formed on the upper and lower sides of the outer wall of the inner bearing ring, and second assembly grooves corresponding to the first assembly grooves are formed on the upper and lower sides of the inner wall of the outer bearing ring. One end of the conductive seal body is pressed and abutted in the first assembly groove, and the other end of the conductive seal body is pressed and abutted in the second assembly groove. In this technical solution, the bearing seal ring with a conductive seal body is at least arranged on one side of the sealed deep groove ball conductive bearing for sealing. The bearing seal ring is respectively matched with the first assembly groove of the inner bearing ring and the second assembly groove of the outer bearing ring for sealing. Furthermore, the sealed deep groove ball conductive bearing can discharge and conduct electric charges through the bearing seal ring, reduce the shaft voltage, and reduce the risk of voltage breakdown, thereby improving the safety performance of the bearing. It should be noted here that if the bearing seal rings are used on both sides of the bearing, the effect of discharging and conducting electric charges will be better.

[0013] Preferably, a guiding outer edge and a guiding inclined surface are formed on the outer wall of the second assembly groove, and one end of the conductive seal body is pressed and abutted against the bottom surface of the second assembly groove along the guiding outer edge and the guiding inclined surface;

[0014] On both sides of the first assembly groove, a matching outer edge and an assembly vertical surface are constructed on the side wall of the inner bearing ring, and the other end of the conductive seal body is pressed and abutted against the assembly vertical surface, the matching outer edge, and the inner wall of the first assembly groove.

[0015] In the above technical solution, the guiding outer edge and the guiding inclined surface play a guiding role in the assembly process of the outer lip and the second assembly groove, improving the assembly efficiency. The gap setting between the assembly vertical surface, the matching outer edge, and the first assembly groove is convenient for the disassembly of the seal ring body during bearing maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of a sealed deep groove ball conductive bearing.

[0017] Figure 2 is Figure 1 the enlarged view at A in

[0018] Figure 3 It is a schematic diagram of a sealed deep groove ball conductive bearing discharging and conducting current through a bearing seal ring. DETAILED DESCRIPTION OF THE INVENTION

[0019] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0022] In the present utility model, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature. Embodiment 1:

[0024] As Figures 1-2 shown, a bearing seal ring includes a seal ring body. The seal ring body includes a skeleton 1 and a sealing main body coated on the outer side of the skeleton 1. Both ends of the sealing main body are abutted and sealed between a bearing outer ring 100 and a bearing inner ring 200. The sealing main body is a conductive sealing main body 2.

[0025] In the above technical solution, the seal ring body includes a skeleton and a sealing main body coated on the outer side of the skeleton. The skeleton is arranged inside the sealing main body as a support for the sealing main body, which can increase the strength of the entire seal ring body. Both ends of the sealing main body are abutted and sealed between the bearing outer ring and the bearing inner ring, so as to connect the bearing outer ring and the bearing inner ring together to form a contact seal. Moreover, the sealing main body is a conductive sealing main body, so that electric charges can flow and be discharged between the bearing outer ring and the bearing inner ring through this conductive sealing main body, reducing the shaft voltage. Furthermore, the current passing through the bearing will be very small, reducing the risk of voltage breakdown and effectively protecting the bearing. It should be noted here that the conductive sealing main body 2 is a nitrile rubber added with carbon black.

[0026] Furthermore, the conductive sealing main body 2 includes a main body portion 3, and an outer lip 4 and an inner lip 5 formed on both sides of the main body portion 3. The outer lip 4 is cooperated and sealed with the bearing outer ring 100, and the inner lip 5 at least includes a groove lip 6 cooperated and sealed with the bearing inner ring 200. In this technical solution, the outer lip of the conductive sealing main body is cooperated and sealed with the bearing outer ring, and the groove lip of the inner lip is cooperated and sealed with the bearing inner ring, so that the conductive sealing main body becomes a low-resistance bypass connected between the bearing outer ring and the bearing inner ring, and electric charges can flow through the outer lip, the main body portion, and the groove lip. In addition, the conductive sealing main body plays a good sealing role, which can keep the inside of the bearing rotating cavity clean and improve the service life of the bearing.

[0027] Furthermore, the inner lip 5 further includes an outer retaining lip 7 formed on the outer side of the groove lip 6, and the outer retaining lip 7 is tightly abutted against the side wall of the bearing inner ring 200. In this technical solution, the setting of the outer retaining lip can enable electric charges to also flow from the outer retaining lip, further improving the electric charge discharge effect, quickly reducing the shaft voltage, and better protecting the bearing. And, the sealing effect is further improved, keeping the inside of the bearing clean.

[0028] Furthermore, the inner lip 5 further includes an inner retaining lip 8 formed on the inner side of the groove lip 6, and the inner retaining lip 8 is tightly abutted against the side wall of the bearing inner ring 200. In this technical solution, the setting of the inner retaining lip can enable electric charges to also flow from the inner retaining lip, further improving the electric charge discharge effect, and more quickly reducing the shaft voltage, better protecting the bearing. And, the inner retaining lip can prevent a large amount of lubricating medium from impacting the groove lip and maintain the structural stability of the inner lip.

[0029] Furthermore, a first accommodation groove 9 is formed between the upper end of the outer lip 4 and the main body portion 3. In this technical solution, the setting of the first accommodation groove improves the structural toughness of the outer lip, facilitates extrusion deformation, and at the same time can increase the impurity content of the sealing ring body and delay the accumulation of impurities.

[0030] Furthermore, a second accommodation groove 10 is formed by enclosing the inner lip 5, the outer retaining lip 7 and the main body portion 3. In this technical solution, the setting of the second accommodation groove improves the structural toughness of the outer retaining lip, facilitates extrusion deformation, and at the same time can increase the impurity content of the sealing ring body and delay the accumulation of impurities.

[0031] Furthermore, the skeleton 1 includes a main bone portion 11, and straight bone portions 12 and inclined bone portions 13 formed at both ends of the main bone portion 11. The straight bone portion 12 extends outwardly close to the end face of the outer lip 4, and the inclined bone portion 13 extends outwardly close to the end face of the inner retaining lip 8. Embodiment 2:

[0032] As Figure 1 and 3 shown, a sealed deep groove ball conductive bearing includes a bearing outer ring 100, a bearing inner ring 200, and a bearing cage disposed between the bearing outer ring 100 and the bearing inner ring 200. Rollers are installed on the bearing cage. The bearing further includes a bearing sealing ring in Embodiment 1. At least one group of the bearing sealing rings is axially sealed between the bearing outer ring 100 and the bearing inner ring 200. First assembly grooves 14 are formed on both the upper and lower sides of the outer wall of the bearing inner ring 200, and second assembly grooves 15 corresponding to the first assembly grooves 14 are formed on both the upper and lower sides of the inner wall of the bearing outer ring 100. One end of the conductive sealing body 2 is pressed and abutted in the first assembly groove 14, and the other end of the conductive sealing body 2 is pressed and abutted in the second assembly groove 15. In this technical solution, the bearing sealing ring with a conductive sealing body is arranged at least on one side of the sealed deep groove ball conductive bearing for sealing. The bearing sealing ring cooperates with the first assembly groove of the bearing inner ring and the second assembly groove of the bearing outer ring for sealing. Furthermore, the sealed deep groove ball conductive bearing can discharge and conduct electric charges through the bearing sealing ring, reduce the shaft voltage, and reduce the risk of voltage breakdown, thereby improving the safety performance of the bearing. It should be noted here that if the bearing sealing ring is used on both sides of the bearing, the effect of discharging and conducting electric charges is better.

[0033] Furthermore, a guiding outer edge 16 and a guiding inclined surface 17 are formed on the outer wall of the second assembly groove 15. One end of the conductive sealing body 2 is pressed into and abutted against the bottom surface of the second assembly groove 15 along the guiding outer edge 16 and the guiding inclined surface 17;

[0034] On both sides of the first assembly groove 14, a mating outer edge 18 and an assembly vertical surface 19 are constructed on the side wall of the inner ring 200 of the bearing, and the other end of the conductive sealing body 2 is tightly pressed against the assembly vertical surface 19, the mating outer edge 18 and the inner wall of the first assembly groove 14.

[0035] In the above technical solution, the guiding outer edge and the guiding inclined surface play a guiding role during the assembly of the outer lip and the second assembly groove, improving the assembly efficiency. The gap setting between the assembly vertical surface, the mating outer edge and the first assembly groove facilitates the disassembly of the sealing ring body during the maintenance of the bearing.

[0036] In this specific embodiment, in view of the electro-corrosion phenomenon that occurs during the operation of the existing motor bearing, the above solution changes the sealing structure of the bearing to a contact seal, and the sealing body of the bearing adopts a conductive sealing body, making it a low-resistance bypass, so that the charge can be discharged through this additional bypass, reducing the shaft voltage, and then reducing the current passing through the bearing, reducing the risk of voltage breakdown, and effectively protecting the bearing.

[0037] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A bearing seal ring, comprising a seal ring body, characterized in that: The sealing ring body includes a skeleton (1) and a sealing main body covering the outside of the skeleton (1). Both ends of the sealing main body are abutted and sealed between the bearing outer ring (100) and the bearing inner ring (200). The sealing main body is a conductive sealing main body (2); the conductive sealing main body (2) includes a main body portion (3), and an outer lip (4) and an inner lip (5) formed on both sides of the main body portion (3). The outer lip (4) is cooperated with the bearing outer ring (100) for sealing, and the inner lip (5) at least includes a groove lip (6) cooperated with the bearing inner ring (200) for sealing; the inner lip (5) further includes an outer retaining lip (7) formed on the outer side of the groove lip (6), and the outer retaining lip (7) is pressed against and abutted to the side wall of the bearing inner ring (200); a second accommodating groove (10) is enclosed among the inner lip (5), the outer retaining lip (7) and the main body portion (3).

2. The bearing seal ring according to claim 1, characterized in that: The inner lip (5) further includes an inner retaining lip (8) formed on the inner side of the groove lip (6), and the inner retaining lip (8) is pressed against and abutted to the side wall of the bearing inner ring (200).

3. The bearing seal ring according to claim 1, wherein: A first accommodating groove (9) is formed between the upper end of the outer lip (4) and the main body portion (3).

4. A bearing seal ring according to claim 1, characterized in that: The skeleton (1) includes a main bone portion (11), and a straight bone portion (12) and an inclined bone portion (13) formed at both ends of the main bone portion (11). The straight bone portion (12) extends outwardly and approaches the end face of the outer lip (4), and the inclined bone portion (13) extends outwardly and approaches the end face of the inner retaining lip (8).

5. A sealed deep groove ball conductive bearing, comprising an outer bearing ring (100), an inner bearing ring (200), and a bearing cage disposed between the outer bearing ring (100) and the inner bearing ring (200), with rollers mounted on the bearing cage, characterized in that: It further includes a bearing sealing ring according to any one of claims 1 to 4. At least one group of the bearing sealing rings is axially sealed between the bearing outer ring (100) and the bearing inner ring (200). First assembly grooves (14) are formed on the upper and lower sides of the outer wall of the bearing inner ring (200), and second assembly grooves (15) corresponding to the first assembly grooves (14) are formed on the upper and lower sides of the inner wall of the bearing outer ring (100). One end of the conductive sealing main body (2) is pressed against and abutted in the first assembly groove (14), and the other end of the conductive sealing main body (2) is pressed against and abutted in the second assembly groove (15).

6. A sealed deep groove ball conductive bearing according to claim 5, characterized in that: A guiding outer edge (16) and a guiding inclined surface (17) are formed on the outer wall of the second assembly groove (15). One end of the conductive sealing main body (2) is pressed and inserted along the guiding outer edge (16) and the guiding inclined surface (17) and abutted to the bottom surface of the second assembly groove (15). Cooperating outer edges (18) and assembly vertical surfaces (19) are constructed on the side walls of the bearing inner ring (200) on both sides of the first assembly groove (14). The other end of the conductive sealing main body (2) is pressed against and abutted to the assembly vertical surface (19), the cooperating outer edge (18) and the inner wall of the first assembly groove (14).

Images