CN219953988U - Conductive sealing ring and bearing with same - Google Patents

Abstract

The utility model provides a conductive sealing ring and a bearing with the same, which realize the conduction of the internal current of the bearing on the premise of ensuring the good sealing performance of the bearing, thereby avoiding the bearing failure problem caused by electric corrosion. The use of an electrically conductive seal ring in a bearing, comprising: a seal ring arranged between the inner ring and the outer ring of the bearing; and an annular conductive member fixed to an axial side surface of the seal ring and contacting the inner ring and the outer ring of the bearing, respectively.

Description

Conductive sealing ring and bearing with same

Technical Field

The utility model relates to a conductive sealing ring and a bearing with the same.

Background

When the bearing is applied to electrified equipment such as motors, generators and the like, shaft current or static charge accumulation can be generated, so that a discharge phenomenon is generated in the bearing, and bearing faults are caused.

Therefore, in order to prevent this discharge phenomenon and to extend the service life of the bearing, it is necessary to provide a conductive member in the bearing structure as shown in patent document 1.

Prior art literature

Patent literature

Patent document 1: CN 111173844A

The structure of patent document 1 includes a bearing and a conductive member, the conductive member is composed of a conductive fiber bundle and a conductive sleeve for fixing the conductive fiber bundle, the conductive member is fixed to an outer ring of the bearing, the conductive member and the outer ring of the bearing form a conductive ring, and the conductive fiber bundle is in contact with an inner ring of the bearing. However, in the structure of patent document 1, the conductive member does not have a sealing function, and thus the working conditions to be applied are limited.

Disclosure of Invention

The present utility model has been made in view of the above-described problems, and an object of the present utility model is to provide a conductive seal ring and a bearing having the conductive seal ring, which are integrated with each other to realize the conduction of the bearing and which have excellent sealing performance.

Specifically, according to claim 1 of the present utility model, there is provided a conductive seal ring for use in a bearing, comprising: a seal ring arranged between the inner ring and the outer ring of the bearing; and an annular conductive member fixed to an axial side surface of the seal ring and contacting the inner ring and the outer ring of the bearing, respectively.

According to claim 2 of the present utility model, in the 1 st aspect, the conductive member is composed of an annular metal plate, a conductive paste, and a conductive fiber bundle disposed in a manner that the annular portion of the metal plate is arranged along a radial direction of the metal plate in a longitudinal direction, and the conductive fiber bundle is fixed to the metal plate by the conductive paste.

According to claim 3 of the present utility model, in the 2 nd aspect, the metal plate is provided with two sheets, and the conductive fiber bundles are sandwiched between the two sheets.

According to the 4 th aspect of the present utility model, in the 2 nd aspect, the length of the conductive fiber bundle is longer than the annular width of the annular portion of the metal plate, and both ends of the conductive fiber bundle are respectively in elastic contact with the inner ring and the outer ring of the bearing.

According to the 5 th aspect of the present utility model, in any one of the 2 nd to 4 th aspects, at least one of the conductive fiber bundles is provided on the circumference of the annular metal plate.

According to a 6 th aspect of the present utility model, in the 5 th aspect, a plurality of the conductive fiber bundles are uniformly provided on the circumference of the annular metal plate.

Further, according to claim 7 of the present utility model, there is provided a bearing having seal rings at both ends in the axial direction, wherein the seal ring at least one end is provided with the conductive member according to any one of claims 1 to 6, and the bearing is formed as a conductive seal ring.

Effects of the utility model

According to the above 1 st aspect, by integrating the conductive member with the seal ring, the bearing can be made conductive when mounted on the bearing, and the bearing also has excellent sealing performance.

According to the above-described claim 2, the conductive member is formed by fixing only the conductive fiber bundle to the metal plate by the conductive paste, and the conductive member can be realized with a simple structure.

According to the above-described claim 3, since the conductive fiber bundles are sandwiched between the two metal plates, the fixation of the conductive fiber bundles is more secure.

According to the above-described 4 th aspect, the conductive fiber bundles extend from the metal plate and both ends are respectively in elastic contact with the inner ring and the outer ring of the bearing, whereby the conductive function can be achieved by the conductive fiber bundles. In addition, the assembling process can be simplified as compared with the case where the conductive member is fixedly connected to the outer ring (the structure of patent document 1).

According to the above-described 5 th aspect, the conductive members can be assembled in a reasonable layout of the conductive fiber bundles.

According to the above-described 6 th aspect, the stable operation of the bearing mounted with the conductive seal ring can be ensured.

According to the 7 th aspect, by using at least one of the seal rings at both axial ends of the bearing as the conductive seal ring, it is possible to realize current conduction in the bearing and to improve the failure problem due to discharge in the bearing.

According to the utility model, on the premise of ensuring the good sealing performance of the bearing, the conduction of the current in the bearing is realized, so that the bearing failure problem caused by electric corrosion is avoided.

Drawings

Fig. 1 is a partial cross-sectional view showing the structure of a bearing having a conductive seal ring.

Fig. 2 is a partial cross-sectional view showing the structure of a conductive assembly of a conductive seal ring.

Fig. 3 is a plan view showing the structure of the conductive member of the conductive seal ring.

Description of the reference numerals

1: outer lane, 2: inner ring, 3: sealing ring, 4: conductive assembly, 5: metal plate, 6: conductive fiber bundles, 7: rolling elements, 8: retainer

Detailed Description

Hereinafter, preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings. For convenience of explanation, there are cases where the proportions of the constituent elements are not uniform and some constituent elements are omitted. In addition, in the bearing, with respect to the axial direction, "outer" means the side away from the center of the rolling element, and conversely, "inner" means the side closer to the center of the rolling element. With respect to radial direction, "outer" refers to the side away from the axis of the bearing and "inner" refers to the side closer to the axis of the bearing. Since the bearing has a symmetrical structure, the entire structure is known to those skilled in the art, although only a part of the cross section is shown in fig. 1.

First, the structure of the bearing of the present embodiment will be described. Fig. 1 is a partial cross-sectional view showing the structure of a bearing having a conductive seal ring. As shown in fig. 1, the bearing includes: an outer ring 1 having an outer ring raceway integrally formed on an inner peripheral surface thereof; an inner ring 2 having an inner ring raceway formed on an outer peripheral surface thereof so as to oppose the outer ring raceway; and rolling elements 7 accommodated between the raceways of the outer ring 1 and the inner ring 2 via a cage 8 so as to be freely rolling-contact. In addition, the method comprises the following steps. Sealing rings 3 are respectively arranged at two axial ends of the bearing and between the outer ring 1 and the inner ring 2. The two radial ends of the sealing ring 3 are respectively contacted with the outer ring 1 and the inner ring 2 of the bearing, thereby realizing the sealing function.

In the bearing shown in fig. 1, only one seal ring 3 is a conductive seal ring, and of course, both seal rings 3 may be conductive seal rings.

Next, a structure of the conductive member of the conductive seal ring according to the present embodiment will be described. Fig. 2 is a partial cross-sectional view showing the structure of the conductive member of the conductive seal ring, and fig. 3 is a plan view showing the structure of the conductive member of the conductive seal ring.

First, as shown in fig. 1, the conductive member 4 is provided on the axially outer side surface of the seal ring 3, and the conductive member 4 is fixed to the seal ring 3 by conductive adhesive, thereby forming a conductive seal ring. The structure of the seal ring 3 is not particularly limited, and may be, for example, a seal ring which is usually used and is composed of a core bar and a rubber material. Further, depending on the specific structure of the seal ring 3, the conductive member 4 may be provided on the axially inner side surface of the seal ring 3 without interfering with the rolling elements.

As shown in fig. 2 and 3, the conductive member 4 is composed of two annular metal plates 5, a conductive paste, not shown, and conductive fiber bundles 6 arranged along the radial direction of the metal plates 5 in the longitudinal direction at the annular portions of the metal plates 5. The conductive fiber bundles 6 are sandwiched between the two metal plates 5, and the conductive fiber bundles 6 are fixed to the metal plates 5 by conductive adhesive.

Further, the length of the conductive fiber bundle 6 is longer than the loop width of the loop portion of the metal plate 5. A part of the conductive fiber bundle 6 is fixed in the metal plate 5, and both ends of the conductive fiber bundle 6 protrude from the annular part of the metal plate 5. The end of the conductive fiber bundle 6 extending from the annular part and facing the inner ring 2 is in interference fit with the inner ring 2, and the end of the conductive fiber bundle 6 extending from the annular part and facing the outer ring 1 is in interference fit with the outer ring 1, so that the two ends of the conductive fiber bundle 6 are in elastic contact with the inner ring 2 and the outer ring 1 of the bearing, and a conductive function is realized.

As shown in fig. 3, a plurality of conductive fiber bundles 6 are preferably provided between two metal plates 5 uniformly along the circumference of the annular metal plate 5. However, only one conductive fiber bundle 6 may be provided. The metal plate 5 may be one piece only, and the conductive fiber bundles 6 may be provided on one side or both sides of the metal plate 5.

Here, from the viewpoint of conductivity, it is preferable that the conductive fiber bundles are conductive carbon fiber bundles, and the metal plate is a copper plate.

With the above structure, the annular conductive member fixed to the seal ring and in contact with the inner ring and the outer ring of the bearing, respectively, is formed.

The specific structure of the conductive member of the conductive seal ring is described above. Next, effects obtained by the conductive seal ring of the present embodiment will be described.

The conductive seal ring according to the present embodiment includes: a seal ring 3 provided between the inner ring 2 and the outer ring 1 of the bearing; and an annular conductive member 4 fixed to an axial side surface of the seal ring 3 and elastically contacting the inner ring 2 and the outer ring 1 of the bearing, respectively. By integrating the conductive member 4 with the seal ring 3, the bearing can be made conductive when mounted on the bearing, and the bearing also has excellent sealing performance.

In the conductive seal ring according to the present embodiment, the conductive member 4 is composed of an annular metal plate 5, a conductive paste, and a conductive fiber bundle 6 disposed on the annular portion of the metal plate 5 so as to extend in the radial direction of the metal plate in the longitudinal direction, and the conductive fiber bundle 6 is fixed to the metal plate 5 by the conductive paste. Since the conductive member 4 is formed by fixing only the conductive fiber bundles 6 to the metal plate 5 by the conductive paste, the conductive member 4 can be realized with a simple structure.

In the conductive seal ring of the present embodiment, two metal plates 5 are provided, and a conductive fiber bundle 6 is sandwiched between the two metal plates 5. Since the conductive fiber bundles 6 are sandwiched between the two metal plates 5, the fixation of the conductive fiber bundles 6 is more secure.

In the conductive seal ring of the present embodiment, the length of the conductive fiber bundle 6 is longer than the annular width of the annular portion of the metal plate 5, and both ends of the conductive fiber bundle 6 are elastically contacted with the inner ring 2 and the outer ring 1 of the bearing, respectively. Thereby, the conductive function can be achieved by the conductive fiber bundle 6. In addition, the assembly process can be simplified as compared with the case where the conductive member is fixed to the outer ring (the structure of patent document 1).

In the conductive seal ring of the present embodiment, one conductive fiber bundle 6 is provided on the circumference of the annular metal plate 5. Alternatively, a plurality of conductive fiber bundles 6 are uniformly provided on the circumference of the annular metal plate 5. Thus, the bearing with the conductive seal ring can be ensured to run stably.

In the bearing using the conductive seal ring of the present embodiment, the seal rings 3 are provided at both ends in the axial direction, and the seal ring 3 at least one end is provided with the conductive member 4 to be a conductive seal ring. By using at least one of the seal rings at both axial ends of the bearing as the conductive seal ring, current conduction can be realized in the bearing, and the failure problem caused by discharge in the bearing can be improved.

According to the embodiment, on the premise of ensuring the good sealing performance of the bearing, the conduction of the internal current of the bearing is realized, so that the bearing failure problem caused by electric corrosion is avoided.

In the above embodiment, the case where the bearing using the conductive seal ring is a single-row ball bearing is illustrated, but other types of bearings are also possible.

The foregoing is a detailed description of only the preferred embodiments of the present utility model. Various modifications and additions and substitutions of the described embodiments may be made by those skilled in the art, and the technical scope of the utility model is defined by the claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (7)

1. An electrically conductive seal ring for use in a bearing, comprising:

the sealing ring is arranged between the inner ring and the outer ring of the bearing; and

and the annular conductive component is fixed on the axial side surface of the sealing ring and is respectively contacted with the inner ring and the outer ring of the bearing.

2. The electrically conductive gasket of claim 1,

the conductive member is composed of an annular metal plate, a conductive adhesive, and a conductive fiber bundle disposed in a longitudinal direction along a radial direction of the metal plate at an annular portion of the metal plate, and the conductive fiber bundle is fixed to the metal plate by the conductive adhesive.

3. The electrically conductive gasket of claim 2,

the metal plate is provided with two sheets, and the conductive fiber bundles are sandwiched between the two sheets of metal plates.

4. The electrically conductive gasket of claim 2,

the length of the conductive fiber bundles is larger than the annular width of the annular part of the metal plate, and two ends of the conductive fiber bundles are respectively in elastic contact with the inner ring and the outer ring of the bearing.

5. The electrically conductive gasket of any of claims 2-4,

at least one conductive fiber bundle is arranged on the circumference of the annular metal plate.

6. The electrically conductive gasket of claim 5,

and a plurality of conductive fiber bundles are uniformly arranged on the circumference of the annular metal plate.

7. A bearing has sealing rings at two axial ends, which is characterized in that,

a seal ring provided with a conductive assembly according to any one of claims 1-6 at least one end to form a conductive seal ring.