Enhanced structure embedded type cloth clamping oil seal

Abstract

The utility model provides a reinforced structure embedded type cloth clamping oil seal which is characterized in that the reinforced structure embedded type cloth clamping oil seal comprises a rubber sealing body and a framework structure embedded in the rubber sealing body, and the rubber sealing body is provided with a sealing body root portion and a sealing body lip portion; the framework structure is composed of a plurality of glass fiber ropes in m rows * n columns, and the glass fiber ropes form a rectangular area from the view of the section. The framework structure is arranged at the root of the sealing body, and the rectangular area is located on the outer half side of the root of the sealing body.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber sealing, in particular to a reinforced structure embedded fabric oil seal. Background Art

[0002] The shaft lip seal, usually called an oil seal, is a mechanical component used to seal liquids (oil or seawater) to prevent leakage. The existing fabric oil seal structure is as Figure 1 shown, and its usage is as Figure 2 shown. Referring to Figure 1 and Figure 2 , the traditional fabric oil seal structure includes a skeleton part 102 and a sealing body 101. The sealing body 101 is made of rubber with high elasticity and mainly functions as a seal. However, the strength of the rubber is low and it cannot be self-positioned, so skeleton materials need to be added. The skeleton part 102 is a fabric material coated with rubber, and this material has high hardness and strength and plays a role in supporting and positioning in the oil seal. The tension spring 103 is installed on the sealing body 101 to keep the lip of the oil seal in contact with the rotating shaft 104 during the working state to prevent liquid from leaking into the air side.

[0003] However, the size of the traditional fabric oil seal is unstable during storage and use. The reasons are as follows: The fabric layer is on the outer edge of the oil seal. The material of the fabric layer is usually cotton fiber or aramid fiber coated with rubber on the surface. After contacting moisture and media, it will shrink, resulting in a smaller outer diameter of the oil seal, losing the interference fit with the sealing groove, causing a gap between the outer diameter of the oil seal and the groove, and thus leakage. In addition, referring to Figure 2 , when the oil seal is initially installed, the outer edge of the oil seal ( Figure 2 the position A shown) and the metal installation groove 105 are in an interference fit. Under the extrusion of the metal groove, the fabric layer on the outer edge is prone to wrinkle, which will cause the outer diameter size of the oil seal to become smaller, resulting in a reduction of the interference amount and affecting the use performance. Summary of the Utility Model

[0004] In order to solve the above problems, the purpose of the utility model is to provide a new type of fabric oil seal to avoid the disadvantages of the unstable size of the traditional oil seal and ensure its elasticity at the same time.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a reinforced structure embedded fabric oil seal, which is characterized in that it includes: a rubber sealing body and a skeleton structure embedded in the rubber sealing body, wherein the rubber sealing body has a sealing body root and a sealing body lip; the skeleton structure is composed of multiple glass fiber ropes arranged in m rows × n columns. From the cross-section, the multiple glass fiber ropes form a rectangular area; the skeleton structure is arranged at the sealing body root, and the rectangular area is located in the outer half part of the sealing body root.

[0007] Furthermore, in the reinforced structure embedded fabric oil seal provided by the present utility model, it may further have the following characteristics: Among them, in the m rows × n columns of the skeleton structure, the row direction corresponds to the axial direction of the fabric oil seal, and the column direction corresponds to the radial direction of the fabric oil seal, where m is not less than 3 and n is not less than 2.

[0008] Furthermore, in the reinforced structure embedded fabric oil seal provided by the present utility model, it may further have the following characteristics: Among them, the distance between the rectangular area and the outer peripheral surface of the root of the sealing body is not less than the diameter of the fiberglass rope, the distance between the rectangular area and the end face on the liquid side corresponding to the root of the sealing body is not less than twice the diameter of the fiberglass rope, and the distance between the rectangular area and the end face on the air side corresponding to the root of the sealing body is not less than twice the diameter of the fiberglass rope.

[0009] Furthermore, in the reinforced structure embedded fabric oil seal provided by the present utility model, it may further have the following characteristics: Among them, a spring installation groove is provided on the lip of the sealing body.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] 1. In the reinforced structure embedded fabric oil seal of the present utility model, fiberglass is provided inside the rubber sealing body. The skeleton structure formed by the fiberglass rope with a rectangular cross-sectional area can provide a good support effect, improve the strength and stability of the oil seal, and achieve the support effect of the fabric layer in the traditional fabric oil seal. The fiberglass rope is wrapped by rubber to avoid the influence of the external environment on its performance.

[0012] 2. The elastic performance of the reinforced structure embedded fabric oil seal of the present utility model is provided by the rubber sealing body. The fiberglass rope has a moderate hardness, and the arrangement with a rectangular cross-sectional area is reasonable, and it will not have an adverse impact on the elastic effect of the rubber sealing body. Therefore, the reinforced structure embedded fabric oil seal of the present utility model can be used in large eccentricity and high-speed working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a cross-sectional schematic view of the structure of a traditional fabric oil seal;

[0014] Figure 2 is a schematic view of the use of a traditional fabric oil seal;

[0015] Figure 3 is a cross-sectional schematic view of the structure of the reinforced structure embedded fabric oil seal in the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the technical means, creative features, achieved objectives and effects realized by the present utility model easy to understand, the following embodiments will specifically elaborate on the technical solutions of the present utility model in conjunction with the accompanying drawings.

[0017] <Embodiment>

[0018] As Figure 3 shown, an embodiment of the present utility model provides a reinforced structure embedded fabric oil seal. It includes a rubber seal body 1 and a skeleton structure embedded in the rubber seal body 1.

[0019] The rubber seal body 1 has a seal body root 11 and a seal body lip 12. A spring installation groove 13 is provided on the seal body lip 12 for installing a tension spring.

[0020] The skeleton structure is arranged at the seal body root 11. The skeleton structure is composed of multiple glass fiber ropes 2 in m rows × n columns. In the m rows × n columns of the skeleton structure, the row direction corresponds to the axial direction of the fabric oil seal, and the column direction corresponds to the radial direction of the fabric oil seal. m is not less than 3, and n is not less than 2.

[0021] Viewed from the cross-section, the multiple glass fiber ropes 2 form a rectangular area, which is located in the outer half part of the seal body root 11. Refer to Figure 3 where the dotted line in divides the seal body root 11 into upper and lower parts, and the outer half part is the upper part.

[0022] The distance between the rectangular area and the outer peripheral surface of the seal body root 11 ( Figure 3 shown as a) is not less than the diameter of the glass fiber rope, and the distance between the rectangular area and the end face of the seal body root 11 corresponding to the liquid side ( Figure 3 shown as c) is not less than 2 times the diameter of the glass fiber rope, and the distance between the rectangular area and the end face of the seal body root 11 corresponding to the air side ( Figure 3 shown as b) is not less than 2 times the diameter of the glass fiber rope.

[0023] The glass fiber rope 2 is a fiber rope woven from glass fibers, which is a material in the prior art and is also called a glass fiber rope. In the reinforced structure embedded fabric oil seal of the embodiment of the present invention, the diameter of the glass fiber rope 2 is set according to the actual size and working conditions of the oil seal. For example, if the oil seal size is large, a glass fiber rope with a larger diameter can be selected; for example, if high strength is required under the working conditions of the oil seal, a glass fiber rope with a larger diameter can also be selected.

[0024] The function of the fiberglass rope 2 is to provide dimensional stability for the oil seal, replacing the supporting effect of the fabric material in the traditional fabric-reinforced oil seal. The rubber material will shrink during the process of cooling to room temperature after vulcanization, and its shrinkage rate is uncertain, which easily leads to large dimensional changes in the finished product. The fiberglass rope makes the shrinkage rate of the rubber body tend to be fixed, improving the dimensional stability of the finished product. The fiberglass rope 2 is embedded inside the rubber seal body 1 and does not come into contact with the external air and liquid media. During storage and use, wear is avoided, ensuring the stable effect of the oil seal structure.

[0025] The above embodiments are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An enhanced structure embedded fabric oil seal, characterized in that, Comprising: A rubber seal body and a skeleton structure embedded in the rubber seal body, wherein the rubber seal body has a seal body root and a seal body lip; The skeleton structure is composed of multiple glass fiber ropes arranged in m rows × n columns. Looking from the cross-section, the multiple glass fiber ropes form a rectangular area; The skeleton structure is arranged at the seal body root, and the rectangular area is located in the outer half part of the seal body root.

2. The reinforced structure embedded fabric oil seal according to claim 1, characterized in that: Among them, In the m rows × n columns of the skeleton structure, the row direction corresponds to the axial direction of the fabric oil seal, and the column direction corresponds to the radial direction of the fabric oil seal. m is not less than 3, and n is not less than 2.

3. The reinforced structure embedded fabric oil seal according to claim 1, characterized in that: Among them, The distance between the rectangular area and the outer peripheral surface of the seal body root is not less than the diameter of the glass fiber rope. The distance between the rectangular area and the end face of the seal body root corresponding to the liquid side is not less than 2 times the diameter of the glass fiber rope. The distance between the rectangular area and the end face of the seal body root corresponding to the air side is not less than 2 times the diameter of the glass fiber rope.

4. The reinforced structure embedded fabric oil seal according to claim 1, characterized in that: Among them, A spring installation groove is provided on the seal body lip.

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