Friction-free rubber spring sealing integrated structure

Abstract

The invention relates to the field of helicopter structure dynamic seal design, in particular to a friction-free rubber spring seal integrated structure. Comprising a neck bush (1), an outer bush (2), an inner supporting piece (3), inner ring rubber (4), outer ring rubber (5), an inner guide ring (6), an outer guide ring (7), an inner O-shaped ring (8) and an outer O-shaped ring (9), the outer diameter of the neck bush (1) is connected with the inner supporting piece (3) through the inner ring rubber (4) in a vulcanization mode, the inner diameter of the outer bush (2) is connected with the inner supporting piece (3) through the outer ring rubber (5) in a vulcanization mode, a groove is formed in the inner diameter of the neck bush (1), and the outer ring rubber (5) is arranged in the groove. A groove is formed in the outer diameter of the outer lining (2) and used for installing an inner O-shaped ring (8), a groove is formed in the outer diameter of the outer lining (2) and used for installing an outer O-shaped ring (9), and grooves are formed in the inner diameter and the outer diameter of the inner supporting piece (3) and used for installing an inner guide ring (6) and an outer guide ring (7).

Description

Technical Field

[0001] The present invention relates to the field of helicopter structural dynamic seal design, and in particular to a frictionless rubber spring seal integrated structure. Background Art

[0002] Traditional helicopter dynamic seals are mostly lip oil seals, mechanical seals, O-rings, hard packing seals, soft packing seals, combined seals and guide structures, etc. Under axial or rotational motion conditions, dynamic seals are often inevitably subject to wear during use, resulting in oil seepage and even oil leakage, reducing sealing reliability.

[0003] In special environments such as high-frequency and small axial displacement, traditional commonly used O-rings, hard packing seals, and soft packing seals are no longer applicable. The combined seal plus guide structure is prone to heat under high-frequency reciprocating motion, resulting in a rapid temperature rise in the structure, causing wear of the seals, which in turn affects the sealing performance and even the service life of the product. Summary of the Invention

[0004] Purpose of the invention: To provide a frictionless rubber spring seal integrated structure, which enables high-frequency reciprocating motion with small axial displacement without friction loss and heat generation.

[0005] Technical solution:

[0006] A frictionless rubber spring seal integrated structure, comprising: an inner bushing 1, an outer bushing 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9, wherein:

[0007] The outer diameter of the inner sleeve 1 and the inner support 3 are connected by vulcanization through the inner ring rubber 4, and the inner diameter of the outer sleeve 2 and the inner support 3 are connected by vulcanization through the outer ring rubber 5. The inner diameter of the inner sleeve 1 has a groove for installing the inner O-ring 8, the outer diameter of the outer sleeve 2 has a groove for installing the outer O-ring 9, and the inner diameter and outer diameter of the inner support 3 have grooves for installing the inner guide ring 6 and the outer guide ring 7.

[0008] Furthermore, the inner sleeve 1 is sleeved on the shaft, and the two ends are axially positioned by bosses and end covers provided on the shaft respectively.

[0009] Furthermore, the shear stiffness of the inner ring rubber 4 and the outer ring rubber 5 are the same.

[0010] Furthermore, the lower end of the inner support member 3 is a thin-walled structure.

[0011] Furthermore, the inner guide ring 6 and the outer guide ring 7 are metal sliders sprayed with tungsten carbide.

[0012] Furthermore, the inner support member 3 is made of aluminum alloy.

[0013] Furthermore, the axial length of the inner bushing 1 is greater than the axial length of the inner ring rubber 4 , and the axial length of the outer bushing 2 is greater than the axial length of the outer ring rubber 5 .

[0014] Furthermore, the axial length of the inner support member 3 is greater than the axial lengths of the inner rubber ring 4 and the outer rubber ring 5 .

[0015] Furthermore, the thickness of the inner bushing 1 and the outer bushing 2 is less than or equal to 4 mm.

[0016] Beneficial effects:

[0017] The present invention provides a frictionless rubber spring seal integrated structure, in which the inner support member has no friction loss during axial movement, dynamic sealing and rigidity are provided by rubber shear deformation, and the O-ring provides static sealing. The overall structure is safe and reliable, compact and easy to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a frictionless rubber spring seal integrated structure according to an embodiment of the present invention;

[0019] Among them, there are inner bushing 1, outer bushing 2, inner support 3, inner ring rubber 4, outer ring rubber 5, inner guide ring 6, outer guide ring 7, inner O-ring 8, and outer O-ring 9. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the implementation of this application will be described in more detail below in conjunction with the drawings in the implementation of this application. In the drawings, the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and should not be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in conjunction with the drawings.

[0021] In the description of the present invention, it should be understood that the terms "center", "axial", "vertical", "up", "down", "upper end", "bottom end", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the scope of protection of the present invention.

[0022] The present invention provides a frictionless rubber spring seal integrated structure, which does not use dynamic seals and adopts the method of shearing rubber vulcanized on metal parts to meet the axial small displacement and high-frequency reciprocating motion. While meeting the use requirements, there is no friction loss and no heat generation. The forming process, installation and disassembly are convenient and simple, and the cost is low.

[0023] Example 1:

[0024] like Figure 1 The present invention provides a frictionless rubber spring seal integrated structure, including an inner sleeve 1, an outer sleeve 2, an inner support 3, an inner ring rubber 4, an outer ring rubber 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9.

[0025] The outer diameter of the inner bushing 1 is vulcanized to the inner support 3 via the inner rubber ring 4, while the inner diameter of the outer bushing 2 is vulcanized to the inner support 3 via the outer rubber ring 5. The inner bushing 1 has a groove on its inner diameter for mounting an inner O-ring 8, while the outer bushing 2 has a groove on its outer diameter for mounting an outer O-ring 9. The inner and outer diameters of the inner support 3 have grooves for mounting an inner guide ring 6 and an outer guide ring 7.

[0026] Example 2:

[0027] A frictionless rubber spring seal integrated structure includes an inner sleeve 1, an outer sleeve 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer sleeve 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer sleeve 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner sleeve 1 has a groove on its inner diameter for mounting the inner O-ring 8, the outer sleeve 2 has a groove on its outer diameter for mounting the outer O-ring 9, and the inner support 3 has grooves on both its inner and outer diameters for mounting the inner guide ring 6 and outer guide ring 7. The inner sleeve 1 is sleeved onto a shaft, and its ends are axially positioned by bosses and end caps provided on the shaft.

[0028] Example 3:

[0029] A frictionless rubber spring seal integrated structure includes an inner sleeve 1, an outer sleeve 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer sleeve 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer sleeve 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner sleeve 1 has a groove on its inner diameter for receiving the inner O-ring 8, the outer sleeve 2 has a groove on its outer diameter for receiving the outer O-ring 9, and the inner support 3 has grooves on both its inner and outer diameters for receiving the inner and outer guide rings 6 and 7. The inner and outer rubber rings 4 and 5 have the same shear stiffness.

[0030] Example 4:

[0031] A frictionless rubber spring seal integrated structure includes an inner sleeve 1, an outer sleeve 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer sleeve 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer sleeve 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner sleeve 1 has a groove on its inner diameter for receiving the inner O-ring 8, while the outer sleeve 2 has a groove on its outer diameter for receiving the outer O-ring 9. The inner support 3 has grooves on both its inner and outer diameters for receiving the inner and outer guide rings 6 and 7. The lower end of the inner support 3 is thin-walled.

[0032] Example 5:

[0033] A frictionless rubber spring seal integrated structure includes an inner sleeve 1, an outer sleeve 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer sleeve 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer sleeve 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner sleeve 1 has a groove on its inner diameter for receiving the inner O-ring 8, while the outer sleeve 2 has a groove on its outer diameter for receiving the outer O-ring 9. The inner support 3 has grooves on both its inner and outer diameters for receiving the inner and outer guide rings 6 and 7. The inner and outer guide rings 6 and 7 are metal sliders sprayed with tungsten carbide.

[0034] Example 6:

[0035] A frictionless rubber spring seal integrated structure includes an inner bushing 1, an outer bushing 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer bushing 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer bushing 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner bushing 1 has a groove on its inner diameter for mounting the inner O-ring 8, the outer bushing 2 has a groove on its outer diameter for mounting the outer O-ring 9, and the inner support 3 has grooves on both its inner and outer diameters for mounting the inner guide ring 6 and outer guide ring 7. The inner support 3 is made of aluminum alloy.

[0036] Example 7:

[0037] A frictionless rubber spring seal integrated structure includes an inner bushing 1, an outer bushing 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer bushing 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer bushing 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner bushing 1 has a groove on its inner diameter for mounting the inner O-ring 8, the outer bushing 2 has a groove on its outer diameter for mounting the outer O-ring 9, and the inner support 3 has grooves on both its inner and outer diameters for mounting the inner guide ring 6 and outer guide ring 7. The inner bushing 1 has an axial length greater than that of the inner rubber ring 4, and the outer bushing 2 has an axial length greater than that of the outer rubber ring 5.

[0038] Example 8:

[0039] A frictionless rubber spring seal integrated structure includes an inner bushing 1, an outer bushing 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer bushing 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer bushing 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner bushing 1 has a groove on its inner diameter for mounting the inner O-ring 8, the outer bushing 2 has a groove on its outer diameter for mounting the outer O-ring 9, and the inner support 3 has grooves on both its inner and outer diameters for mounting the inner guide ring 6 and outer guide ring 7. The inner support 3 has an axial length greater than that of the inner rubber ring 4 and outer rubber ring 5.

[0040] Example 9:

[0041] A frictionless rubber spring seal integrated structure includes an inner sleeve 1, an outer sleeve 2, an inner support 3, an inner rubber ring 4, an outer rubber ring 5, an inner guide ring 6, an outer guide ring 7, an inner O-ring 8, and an outer O-ring 9. The outer sleeve 1's outer diameter is vulcanized to the inner support 3 via the inner rubber ring 4, while the outer sleeve 2's inner diameter is vulcanized to the inner support 3 via the outer rubber ring 5. The inner sleeve 1 has a groove on its inner diameter for mounting the inner O-ring 8, the outer sleeve 2 has a groove on its outer diameter for mounting the outer O-ring 9, and the inner support 3 has grooves on both its inner and outer diameters for mounting the inner and outer guide rings 6 and 7. The thickness of the inner sleeve 1 and outer sleeve 2 is 4 mm or less.

[0042] During installation, the inner bushing 1 engages the inner shaft of the structure, with the inner O-ring 8 sealing the inner bushing 1 against the inner shaft. The outer bushing 2 engages the outer wall of the structure, with the outer O-ring 9 sealing the outer bushing 2 against the outer wall. The inner guide ring 6 and outer guide ring 7 engage the inner shaft and outer wall of the structure, respectively, ensuring axial movement of the inner support member 3. The guide rings provide wear resistance and radial positioning. Furthermore, the inner and outer rubber rings 4 and 5 provide axial stiffness. Adjusting the rubber structure dimensions and stiffness parameters allows the entire structure to achieve both sealing and axial movement.

[0043] Innovations of the present invention:

[0044] 1. Achieve axial displacement and act as a seal at the same time

[0045] 2. Sealing is achieved through rubber deformation without friction loss

[0046] 3. Changes in stiffness can be achieved by adjusting the rubber size

[0047] 4. Compact structure, realizing integrated design of spring stiffness, sealing and axial movement

[0048] 5. Rubber and metal are connected by vulcanization, which is highly reliable and leak-free.

[0049] 6. Shear rubber can ensure the tensile and compressive stiffness linearity

[0050] 7. The slider can ensure smooth axial movement without tilting or jamming

[0051] 8. The structure is an integral structure, which is easy to maintain, disassemble and install without additional adjustment.

[0052] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A frictionless rubber spring seal integrated structure, characterized in that: include: Inner bushing, outer bushing, inner support, inner ring rubber, outer ring rubber, inner guide ring, outer guide ring, inner O-ring, outer O-ring, among which, The outer diameter of the inner bushing is connected to the inner support by vulcanization through the inner ring rubber, and the inner diameter of the outer bushing is connected to the inner support by vulcanization through the outer ring rubber. The inner diameter of the inner bushing is grooved for installing the inner O-ring, the outer diameter of the outer bushing is grooved for installing the outer O-ring, and the inner diameter and outer diameter of the inner support are grooved for installing the inner guide ring and the outer guide ring.

2. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The liner sleeve is sleeved on the shaft, and the two ends are axially positioned by bosses and end covers provided on the shaft respectively.

3. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The shear stiffness of the inner and outer rubber rings is the same.

4. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The lower end of the inner support member is a thin-wall structure.

5. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The inner and outer guide rings are metal slides sprayed with tungsten carbide.

6. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The inner support material is aluminum alloy.

7. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The axial length of the inner bushing is greater than the axial length of the inner ring rubber, and the axial length of the outer bushing is greater than the axial length of the outer ring rubber.

8. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The axial length of the inner support member is greater than the axial lengths of the inner ring rubber and the outer ring rubber.

9. The frictionless rubber spring seal integrated structure according to claim 1, characterized in that: The thickness of the inner and outer bushings is less than or equal to 4 mm.

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