CN107559317A - A kind of water-sealed bearing - Google Patents

Abstract

The present invention relates to the technical field of bearings, specifically a waterproof bearing, which includes an inner ring, an outer ring, and a sealing ring arranged between the inner ring and the outer ring. The outer wall of the inner ring is provided with a first sealing ring groove. The inner ring of the sealing ring is sequentially provided with a first waterproof layer, a second waterproof layer, a third waterproof layer and an oil-proof layer, and a counter deformation groove is arranged between the first waterproof layer and the oil-proof layer. The invention has simple structure and strong practicability.

Description

A waterproof bearing

technical field

The invention relates to the technical field of bearings, in particular to a waterproof bearing.

Background technique

Bearings are an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy.

The existing waterproof bearings on the market are suitable for ordinary environments. For non-underwater harsh environments, such as being completely immersed in water, high-tightness seals are not required. On the contrary, although the waterproof bearings currently on the market can reach a certain The waterproof effect is usually achieved by the friction between the two seals fixed on the inner and outer rings. However, if there is pressure, water will easily flow from the two seals on the inner and outer rings. The friction gap between the parts enters the inside of the bearing and damages the bearing.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a bearing with better waterproof effect under high pressure.

In order to achieve the above object, the present invention provides the following technical solution: a waterproof bearing, comprising an inner ring, an outer ring and a sealing ring arranged between the inner ring and the outer ring, the outer wall of the inner ring is provided with a first seal A ring groove, the inner ring of the sealing ring is provided with a first waterproof layer and an oil-proof layer in sequence, and a counter deformation groove is arranged between the first waterproof layer and the oil-proof layer.

Further, a second waterproof layer is provided between the first waterproof layer and the opposing deformation groove.

Further, a third waterproof layer is provided between the said opposing deformation groove and the second waterproof layer.

Further, the inner wall of the outer ring is provided with a second sealing ring groove, the outer ring of the sealing ring is provided with a positioning part adapted to the second sealing ring groove, and the positioning part is interference fit with the second sealing ring groove.

Further, the first sealing ring groove includes a first ring side wall and a second ring side wall, the second waterproof layer is connected to the second ring side wall in interference, and the third waterproof layer is connected to the second ring side wall The sidewall interferes with the connection.

Further, the first waterproof layer is in interference connection with the side wall of the first ring.

Further, the first waterproof layer includes a first ring surface, and the first ring surface is bonded to the side wall of the first ring.

Further, the second waterproof layer includes a second ring surface, and the second ring surface is attached to the side wall of the second ring, and the third waterproof layer includes a third ring surface, and the third ring surface is connected to the side wall of the second ring. Wall fit.

Further, the oil-proof layer is connected to the outer wall of the inner ring by interference.

Further, the oil-proof layer includes a fourth ring surface, and the fourth ring surface is attached to the outer wall of the inner ring.

Compared with the deficiencies of the existing technology, the beneficial effect brought by the technical solution provided by the present invention: when the force F acts on the first waterproof layer, the point d on the first ring surface moves to the direction of the side wall of the first ring to D point, therefore, the first ring surface and the first ring side wall fit more compactly, the larger F is, the tighter the first waterproof lamination is, and the c point on the second ring surface moves toward the second ring side wall To point C, therefore, the second annulus and the side wall of the second annulus fit more compactly, and the larger F is, the tighter the second waterproof lamination is; similarly, point b on the third annulus faces toward the second The direction of the side wall of the ring moves to point B. Therefore, the third ring surface and the side of the second ring are more tightly bonded. The larger F is, the tighter the third waterproof laminate is; at the same time, due to the design of the hedging deformation groove, the strong When F acts on the first waterproof layer, the cross-section of the hedging deformation groove is U-shaped, and the U-shaped groove deforms, and the point a on the fourth ring surface moves toward the outer wall of the inner ring to point A, and the oil-proof layer is pulled downward, automatically supply to reduce the degree of deformation of the hedging deformation groove, so that the fourth annulus and the outer wall of the inner ring fit more compactly. The larger F is, the tighter the oil-proof lamination is. The greater the external pressure F, the better the waterproof effect.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Figure 2 is a schematic diagram of the structure of the outer ring.

Figure 3 is a structural schematic diagram of the inner ring.

Fig. 4 is a structural schematic diagram of the deformation of the sealing ring under force.

FIG. 5 is an enlarged schematic diagram of part G of FIG. 4 .

detailed description

The present invention will be further described with reference to Fig. 1-Fig. 5 .

Example 1

As shown in Figure 1 and Figure 4: a waterproof bearing, including an inner ring 1, an outer ring 2 and a sealing ring 3 arranged between the inner ring 1 and the outer ring 2, the outer wall of the inner ring 1 is provided with a second A sealing ring groove 11, the inner ring 1 of the sealing ring 3 is provided with a first waterproof layer 34, a second waterproof layer 33, a third waterproof layer 32 and an oil-proof layer 31 in sequence, and the third waterproof layer 32 is connected with the waterproof layer Between the oil layers 31, there is a hedging deformation groove 35, the cross section of the hedging deformation groove 35 is U-shaped. degree of deformation.

When a force F acts on the first waterproof layer 34 (as shown in FIG. 4 ), point d on the first ring surface 311 moves to point D in the direction of the first ring side wall 111, so that the first ring surface 311 The tighter the fit with the first ring side wall 111, the larger F is, the tighter the pressure of the first waterproof layer 34 is, and the point c on the second ring surface 321 moves toward the second ring side wall 112 to point C, so , so that the second ring surface 321 and the second ring side wall 112 fit more compactly, the larger F is, the tighter the pressure of the second waterproof layer 33 is; similarly, point b on the third ring surface 331 moves toward the second ring The direction of the side wall 112 moves to point B, so that the third ring surface 331 and the second ring side wall 112 fit more compactly. The larger F is, the tighter the pressure of the third waterproof layer 32 is; 35 design, when the force F acts on the first waterproof layer 34 (as shown in Figure 4), the section of the hedge deformation groove 35 is U-shaped, the U-shaped groove is deformed, and the point a on the fourth ring surface 341 is inward The direction of the outer wall of the ring 1 is moved to point A to reduce the degree of deformation of the counter deformation groove 35. Therefore, the fourth ring surface 341 and the outer wall of the inner ring 1 are more compactly attached. The larger F is, the tighter the pressure of the oil-proof layer 31 is. As shown in Figure 5, the dotted line part is the part where the sealing ring is deformed by force.

According to the above working principle, the greater the external pressure F, the better the waterproof effect.

Another innovative point of the present invention is the structural design of the first sealing ring groove 11 and the position design of the first waterproof layer 34, the second waterproof layer 33, the third waterproof layer 32 and the oil-proof layer 31, because when the outside world has F , point a of the first toroidal surface 311, point b of the second toroidal surface 321, point c of the third toroidal surface 331, and point d of the fourth toroidal surface 341 are all toward the second ring side wall 112 and the first ring side The wall 111 , the first ring side wall 111 and the outer wall of the inner ring 1 are in close contact.

As shown in Figure 3 and Figure 1: the inner wall of the outer ring 2 is provided with a second sealing ring groove 21, the outer ring 2 of the sealing ring 3 is provided with a positioning part 36 adapted to the second sealing ring groove, the positioning part 36 is interference fit with the second sealing ring groove 21, on the one hand, the sealing effect between the inner ring 1 and the sealing ring 3 is increased, and on the other hand, the positioning effect between the inner ring 1 and the sealing ring 3 is increased.

As shown in Figure 2 and Figure 1: the first waterproof layer 34 includes a first ring surface 311, the first ring surface 311 is attached to the first ring side wall 111, the first ring surface 311 of the first waterproof layer 34 Conflicting connection with the inner wall of the outer ring 2.

As shown in Figure 2 and Figure 1: the first seal ring groove 11 includes a first ring side wall 111 and a second ring side wall 112, the second waterproof layer 33 includes a second ring surface 321, the second The ring surface 321 is attached to the second ring side wall 112, and the third waterproof layer 32 includes a third ring surface 331, and the third ring surface 331 is attached to the second ring side wall 112. The second waterproof layer 33 The second ring surface 321 of the third waterproof layer 32 is connected to the first ring side wall 111 by interference, and the third ring surface 331 of the third waterproof layer 32 is connected to the second ring side wall 112 by interference.

As shown in FIG. 1 , the oil-proof layer 31 is in contact with the second ring side wall 112 , and the oil-proof layer 31 includes a fourth ring surface 341 , and the fourth ring surface 341 is attached to the outer wall of the inner ring 1 .

Example 2

This embodiment is basically the same as Embodiment 1. The only difference is that this embodiment does not have a third waterproof layer 32. Using the above-mentioned principle, the first waterproof layer 34, the second waterproof layer 33 and the oil-proof layer 31 are used to reduce the external pressure. The larger the purpose, the better the waterproof effect.

Example 3

This embodiment is basically the same as Embodiment 1. The only difference is that this embodiment does not have the second waterproof layer 33 and the third waterproof layer 32. Using the above-mentioned principle, the first waterproof layer 34 and the oil-proof layer 31 are used to reduce the external pressure. The larger the purpose, the better the waterproof effect.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A waterproof bearing, comprising an inner ring, an outer ring and a sealing ring arranged between the inner ring and the outer ring, characterized in that: the outer wall of the inner ring is provided with a first sealing ring groove, and the sealing ring The inner ring is provided with a first waterproof layer and an oil-proof layer in sequence, and a counter deformation groove is arranged between the first waterproof layer and the oil-proof layer. 2. A waterproof bearing according to claim 1, characterized in that a second waterproof layer is provided between the first waterproof layer and the opposing deformation groove. 3. A waterproof bearing according to claim 1 or 2, characterized in that a third waterproof layer is provided between the opposing deformation groove and the second waterproof layer. 4. A waterproof bearing according to claim 3, characterized in that: the inner wall of the outer ring is provided with a second sealing ring groove, and the outer ring of the sealing ring is provided with a positioning position adapted to the second sealing ring groove part, the positioning part is interference fit with the second sealing ring groove. 5. A waterproof bearing according to claim 1, characterized in that: said first sealing ring groove includes a first ring side wall and a second ring side wall, and said second waterproof layer and second ring The side wall interferes with the connection, and the third waterproof layer is connected with the side wall of the second ring through resistance. 6. A waterproof bearing according to claim 1 or 2, characterized in that the first waterproof layer is in conflicting connection with the side wall of the first ring. 7. The waterproof bearing according to claim 5, wherein the first waterproof layer comprises a first ring surface, and the first ring surface is bonded to the side wall of the first ring. 8. A waterproof bearing according to claim 6, characterized in that: the second waterproof layer includes a second ring surface, the second ring surface is attached to the side wall of the second ring, and the third waterproof layer The layer includes a third annulus that fits against the sidewall of the second annulus. 9. The waterproof bearing according to claim 1, characterized in that the oil-proof layer is in conflicting connection with the outer wall of the inner ring. 10 . The waterproof bearing according to claim 9 , wherein the oil-proof layer includes a fourth annular surface, and the fourth annular surface is attached to the outer wall of the inner ring. 11 .