Shaft sealing ring

Abstract

The utility model discloses a shaft type sealing ring, including support piece and sealing portion, the support piece includes fixed section and inner support section, fixed section and inner support section both are annular, the inner support section is provided fixed section towards the circle center side, the inner support section is arc-shaped, and the circle center direction of arc is set towards the circle center of fixed section. The sealing part wraps the inner supporting section, the structural strength is enhanced through the arrangement of the inner supporting section, and even if the sealing part is used for a long time, the sealing part can still be sealed with shafts or other workpieces under the action of the supporting piece.

Description

Technical Field

[0001] This utility model relates to the field of sealing rings, and more particularly to a shaft sealing ring. Background Technology

[0002] As a type of traditional O-ring, shaft seals generally consist of a fixed part and a sealing part. The traditional shaft sealing part is usually not supported. During long-term use, the traditional seal ages, causing the sealing part to separate from the contact part, resulting in poor sealing performance. Utility Model Content

[0003] This invention addresses the shortcomings of existing sealing rings that lack internal support and have poor sealing performance, by providing a shaft-type sealing ring.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a shaft-type sealing ring, comprising a support member and a sealing part, wherein the support member comprises a slotted fixing section and an inner support section, both of which are annular, and the inner support section is disposed on the side of the slotted fixing section facing the center, the inner support section being arc-shaped with the center of the arc facing the center of the slotted fixing section, and the sealing part is wrapped around the inner support section.

[0005] By adopting the above technical solution, the inner support section enhances the structural strength, and even after long-term use, the sealing part can still form a seal with shafts or other workpieces under the action of the support.

[0006] The present invention is further configured such that: the sealing part is integrally formed with a fixing part, and the fixing part is fitted to the slot fixing section.

[0007] By adopting the above technical solution, the function of the fixing part is to fill the gap between the slot fixing section and the slot, and increase the stability of the sealing ring during fixing.

[0008] The present invention is further configured such that: a plurality of protrusions are provided on the slot fixing section where they fit with the fixing part, and the fixing part is arranged to wrap around the protrusions on the slot fixing section.

[0009] By adopting the above technical solution, the protrusions increase the contact area, resulting in better bonding between the two during secondary molding.

[0010] The present invention is further configured such that: the center of the inner support section on the side away from the center is integrally formed with the slot fixing section, and the sealing part is arranged in an arc shape with the same shape as the inner support section.

[0011] By adopting the above technical solution, the sealing part is arc-shaped. Since it is equipped with an inner support member and the inner support section is arc-shaped, the arc-shaped inner support section can be elastically deformed to adapt to shafts of different diameters.

[0012] The present invention is further configured such that: the sealing part is provided with a sealing lip, and the sealing lip protrudes from the end face of the sealing part in the axial direction.

[0013] By adopting the above technical solution, the sealing lip is used to increase the sealing performance between the shaft and the bearing.

[0014] The present invention is further configured such that: the slot fixing section includes a slot bottom fixing section and a slot depth fixing section, the slot bottom fixing section and the slot depth fixing section are arranged at right angles, and the slot depth fixing section and the inner support section are integrally formed.

[0015] By adopting the above technical solution, the function of the bottom fixing section and the depth fixing section is to enhance the structural strength of the hole fixing section itself, thereby increasing the fixing effect.

[0016] The present invention is further configured such that both the sealing part and the fixing part are made of rubber.

[0017] By adopting the above technical solution, the rubber material is easy to deform elastically, thereby increasing the sealing effect.

[0018] This utility model, by adopting the above technical solution, has significant technical effects: The technical solution is applied to the sealing between the shaft and the bearing seat. The bearing seat has a slot for fixing a support member. A slot fixing section is installed inside the slot. The fixing section is made of rubber and has elastic deformation capability. The slot fixing section abuts against one side of the slot, and the fixing section elastically presses against the other side of the slot. The installation of the support member bearing seat is completed through the elastic deformation of the fixing section and the fixing section itself. The sealing section's arc-shaped side abuts against the shaft, and the sealing lip abuts against the shaft and / or the bearing seat, thus forming a seal on the shaft. Because an inner support member is provided and the inner support section is arc-shaped, this arc-shaped inner support section can elastically deform to adapt to shafts of different diameters. When the diameter variation range of the shaft does not exceed the elastic deformation limit of the inner support section, even if the shaft has slight shaft runout during rotation, the elastically deformable inner support section can always drive the arc-shaped side of the sealing section to abut against the shaft, thereby completing the seal on the shaft. Attached Figure Description

[0019] Figure 1 This is an overall state diagram of a shaft-type sealing ring in Embodiment 1;

[0020] Figure 2 This is a diagram showing the fit between the sealing ring and the shaft and bearing in Embodiment 1;

[0021] Figure 3 This is a cross-sectional view of the sealing ring in Example 2.

[0022] The parts referred to by the numbers in the above figures are as follows: 1. Support component; 11. Groove fixing section; 12. Inner support section; 2. Sealing part; 21. Fixing part; 22. Sealing lip; 3. Shaft body; 4. Shaft seat; 111. Groove bottom fixing section; 112. Groove depth fixing section. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] Example 1:

[0025] A type of shaft seal ring, combined with Figure 1 and Figure 2 The system includes a support member 1 and a sealing part 2. The support member 1 includes a slotted fixing section 11 and an inner support section 12. Both the slotted fixing section 11 and the inner support section 12 are annular structures. In this embodiment, the cross-section of one side of the slotted fixing section 11 is elongated, and the inner support section 12 is arc-shaped. The center of the arc of the inner support section 12 is oriented towards the center of the slotted fixing section 11. The center of the inner support section 12 on the side away from the center is integrally formed with the slotted fixing section 11. The sealing part 2 is made of elastically deformable rubber, and the support member 1 is made of hard plastic. The sealing part 2 wraps around the entire outer side of the inner support section 12. A fixing part 21 extends from the sealing part 2 toward the slotted fixing section 11. The fixing part 21 is integrally formed with the sealing part 2. 1. It is fitted to one side of the slot fixing section 11. Several protrusions are provided on the side of the slot fixing section 11 that is fitted to the fixing part 21. The fixing part 21 is formed in a secondary shape relative to the slot fixing section 11. Therefore, the fixing part 21 is wrapped around the side of the slot fixing section 11 and the protrusions on the slot fixing section 11. The protrusions are mainly used to increase the contact area between the fixing part 21 and the slot fixing section 11. The protrusions can be strip-shaped or dot-shaped. The sealing part 2 is arc-shaped with the same shape as the inner support section 12. A sealing lip 22 is provided on the end face of the sealing part 2 along the axial direction. In this embodiment, the sealing lip 22 is only provided on one end of the sealing part 2, but it is not limited to only one end. The other end of the sealing part 2 along the axial direction can also be provided with a sealing lip 22.

[0026] This technical solution is applied to the sealing between the shaft body 3 and the bearing seat 4. The bearing seat 4 has a slot for fixing the support member 1. The slot fixing section 11 is installed in the slot. The fixing part 21 is made of rubber and has elastic deformation capability. The slot fixing section 11 abuts against one side of the slot, and the fixing part 21 elastically presses against the other side of the slot. The installation of the support member 1 and the bearing seat 4 is completed by the elastic deformation of the fixing part 21. The arc-shaped side of the sealing part 2 can abut against the shaft body 3, and the sealing lip 22 is also in contact with the shaft body 3. The inner support 12 is provided and abuts against the bearing seat 4, thereby forming a seal on the shaft 3. Since the inner support 12 is provided and is arc-shaped, the arc-shaped inner support 12 can be elastically deformed to adapt to shafts 3 of different diameters. When the diameter variation range of the shafts 3 of different diameters does not exceed the elastic deformation limit of the inner support 12, even if the shaft 3 has slight shaft runout during rotation, the elastically deformable inner support 12 can always drive the arc-shaped side of the sealing part 2 to abut against the shaft 3, thereby completing the sealing of the shaft 3.

[0027] Example 2:

[0028] The difference between this embodiment and Embodiment 1 is that, in combination with... Figure 3 The slot fixing section 11 has a different structure. In this embodiment, the slot fixing section 11 is L-shaped and includes a slot bottom fixing section 111 and a slot depth fixing section 112. The slot bottom fixing section 111 and the slot depth fixing section 112 are set at a 90-degree right angle. The fixing part 21 is fitted to both the slot bottom fixing section 111 and the slot depth fixing section 112. The width of the slot bottom fixing section 111 is set to the width of the slot on the bearing seat 4, and the length of the slot depth fixing section 112 is the depth of the slot on the bearing seat 4. The L-shaped fixing section can strengthen the connection between the fixing section and the bearing seat 4.

Claims

1. A shaft-type sealing ring, characterized in that, The device includes a support member (1) and a sealing part (2). The support member (1) includes a slotted fixing section (11) and an inner support section (12). Both the slotted fixing section (11) and the inner support section (12) are annular. The inner support section (12) is located on the side of the slotted fixing section (11) facing the center. The inner support section (12) is arc-shaped and the center of the arc is oriented towards the center of the slotted fixing section (11). The sealing part (2) is wrapped around the inner support section (12).

2. The shaft seal ring according to claim 1, characterized in that, The sealing part (2) is integrally formed with a fixing part (21), and the fixing part (21) is fitted to the slot fixing section (11).

3. A shaft seal ring according to claim 2, characterized in that, The slotted fixing section (11) has several protrusions at the joint with the fixing part (21), and the fixing part (21) is arranged to wrap around the protrusions on the slotted fixing section (11).

4. A shaft seal ring according to claim 1, characterized in that, The center of the inner support section (12) on the side away from the center is integrally formed with the slot fixing section (11), and the sealing part (2) is arranged in an arc shape with the same shape as the inner support section (12).

5. A shaft seal ring according to claim 1, characterized in that, The sealing part (2) is provided with a sealing lip (22), which is provided on the end face of the sealing part (2) in the axial direction.

6. A shaft seal ring according to claim 1, characterized in that, The slot fixing section (11) includes a slot bottom fixing section (111) and a slot depth fixing section (112). The slot bottom fixing section (111) and the slot depth fixing section (112) are set at right angles. The slot depth fixing section (112) and the inner support section (12) are integrally formed.

7. A shaft seal ring according to claim 1, characterized in that, Both the sealing part (2) and the fixing part (21) are made of rubber.

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