Composite rotating shaft gasket

Abstract

The utility model provides a composite rotating shaft gasket which comprises a wear-resistant surface layer, a composite layer and a bottom layer, and the bottom end of the wear-resistant surface layer protrudes outwards to form a plurality of first protrusions in an annular array. A plurality of first grooves are formed in the top surface of the composite layer, and the first protrusions are matched with the first grooves; a plurality of second protrusions are arranged on the bottom surface of the composite layer, and a plurality of second grooves are formed in the top surface of the bottom layer. The second groove is matched with the second protrusion. According to the composite rotating shaft gasket, the wear-resistant surface layer, the composite layer and the bottom layer are matched through the protrusions and the grooves, all the layers are connected in a reinforced mode through welding and the like, the torque force between the composite rotating shaft gasket can be increased, and layering of the gasket in the using process is avoided. Wherein the axial rigidity and radial flexibility of the composite layer can be improved through steel wire-two layers of silicone rubber-steel wire, and the upper silicone rubber layer realizes initial contact buffering; the lower silicone rubber layer is a later bearing support; therefore, the abrasion resistance and the buffering performance of the automobile seat cushion are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of gasket technology, specifically a composite shaft gasket. Background Technology

[0002] Shaft shims are key functional components installed between rotating shafts and bearings / housings. They are mainly responsible for force transmission: uniformly distributing axial loads; vibration control: attenuating mechanical vibrations from 20 to 2000 Hz; and clearance compensation. Although small, shaft shims are key factors affecting the reliability, accuracy, and energy efficiency of rotating machinery.

[0003] Existing shaft gaskets have a simple structure and mostly use homogeneous materials (such as pure copper sheets or ordinary rubber). They cannot achieve both wear resistance and cushioning. There are also two-layer composite shaft gaskets, which are prone to delamination during use. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a composite shaft gasket that can solve the existing problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] This utility model is achieved through the following technical solution: a composite shaft gasket, comprising a wear-resistant surface layer, a composite layer, and a bottom layer, wherein the bottom end of the wear-resistant surface layer protrudes outward to form multiple protrusions in a ring array; the top surface of the composite layer is provided with multiple grooves, and the protrusions are adapted to the grooves; the bottom surface of the composite layer is provided with multiple protrusions, and the top surface of the bottom layer is provided with multiple grooves; the grooves are adapted to the protrusions.

[0007] Furthermore, the composite layer includes a steel wire layer one, a silicone rubber layer one, a silicone rubber layer two, and a steel wire layer two; a silicone rubber layer one and a silicone rubber layer two are disposed between the steel wire layer one and the steel wire layer two.

[0008] Furthermore, the first silicone rubber layer and the second silicone rubber layer adopt a honeycomb structure, and the honeycomb pore size of the first silicone rubber layer is larger than that of the second silicone rubber layer.

[0009] Furthermore, there are four of each of the first and second protrusions, and the cross-sections of the first and second protrusions adopt a fan-shaped structure; the number and shape of the first groove are the same as those of the first protrusion, and the number and shape of the second groove are the same as those of the second protrusion.

[0010] Furthermore, the wear-resistant surface layer, the composite layer, and the bottom layer have openings at their centers. The thickness of the wear-resistant surface layer is 0.1-0.3 mm; the thickness of the composite layer is 0.5-2.0 mm; and the thickness of the bottom layer is 1.0-2.5 mm.

[0011] Furthermore, the surface of the wear-resistant layer is fish-scale shaped, and an oil reservoir is formed on the surface of the wear-resistant layer; a connecting annular groove and a vertical groove are formed on the surface of the wear-resistant layer, and the oil reservoir is connected to the annular groove through the vertical groove.

[0012] Furthermore, the cross-section of the oil storage tank has a small top diameter and a large bottom diameter, and the oil storage tank is arranged in a circular array of four.

[0013] Compared with the prior art, the beneficial effects of this utility model include:

[0014] The composite shaft gasket of this invention has a wear-resistant surface layer, a composite layer and a bottom layer connected by protrusions and grooves, and the layers are further reinforced by welding and other methods. This can increase the torque force between the composite shaft gaskets and prevent the gaskets from delaminating during use.

[0015] The composite layer, consisting of steel wire, two layers of silicone rubber, and steel wire, enhances axial stiffness and radial flexibility, effectively improving impact resistance and vibration suppression. The upper silicone rubber layer absorbs impact energy through the collapse of its large-pore structure, while the lower silicone rubber layer stores energy through elastic deformation using its small-pore structure. The upper silicone rubber layer provides initial contact buffering, while the lower silicone rubber layer provides subsequent load-bearing support. Therefore, the wear resistance and buffering performance of this invention are greatly improved. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of a composite shaft washer according to the present invention;

[0018] Figure 2 This is a side view of the wear-resistant surface layer in an embodiment of this utility model.

[0019] Figure 3 This is a side view of the composite layer in an embodiment of this utility model.

[0020] The diagram shows the following labels: 1. Wear-resistant surface layer; 11. Annular groove; 12. Vertical groove; 13. Oil reservoir; 2. Protrusion 1; 3. Composite layer; 31. Steel wire layer 1; 32. Silicone rubber layer 1; 33. Silicone rubber layer 2; 34. Steel wire layer 2; 4. Groove 1; 5. Protrusion 2; 6. Bottom layer; 7. Groove 2. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] A composite shaft washer, such as Figure 1 As shown, the device includes a wear-resistant surface layer 1, a composite layer 3, and a bottom layer 6. The bottom end of the wear-resistant surface layer 1 protrudes outward to form multiple protrusions 2 arranged in a ring array. The wear-resistant surface layer 1 is exemplarily made of polytetrafluoroethylene (PTFE). The bottom layer 6 is made of titanium alloy; however, it is not limited to this. The top surface of the composite layer 3 has multiple grooves 4, and the protrusions 2 are adapted to the grooves 4. The bottom surface of the composite layer 3 has multiple protrusions 5, and the top surface of the bottom layer 6 has multiple grooves 7, which are adapted to the protrusions 5. For example, there are four protrusions 2 and 5. The wear-resistant surface layer 1, the composite layer 3, and the bottom layer 6 are connected by the cooperation of the protrusions and grooves, and the layers are further reinforced by welding or other methods. This increases the torque force between the composite shaft gaskets and prevents delamination during use.

[0023] The composite layer 3 includes a steel wire layer 31, a silicone rubber layer 32, a silicone rubber layer 33, and a steel wire layer 34; for example... Figure 3 As shown, a silicone rubber layer 32 and a silicone rubber layer 33 are provided between the first steel wire layer 31 and the second steel wire layer 34.

[0024] The technical advantages of the steel wire-two-layer silicone rubber-steel wire three-layer composite buffer layer are:

[0025] I. Improvement of Structural Mechanical Performance

[0026] Anisotropic stiffness control

[0027] Axial stiffness: Steel wire mesh provides high stiffness of 200-500 N / mm (8-10 times higher than pure silicone).

[0028] Radial flexibility: The honeycomb silicone maintains a deformability of 50-100 N / mm.

[0029] Achieve rigid-flexible coupling characteristics (Poisson's ratio adjustable range 0.25-0.4)

[0030] Multi-directional load adaptation

[0031] Axial load-bearing capacity: The wire mesh bears more than 80% of the compressive stress (compressive strength ≥150MPa).

[0032] Shear deformation: Honeycomb silicone absorbs 90% of the shear energy (shear modulus 0.5-1.2 MPa)

[0033] Impact resistance: The composite structure has an energy absorption density of 15-25 J / cm³. 3

[0034] II. Dynamic Performance Optimization

[0035] Broadband vibration suppression

[0036] High frequency band (>500Hz): phonon bandgap effect of wire mesh (vibration attenuation 40dB)

[0037] Mid-frequency band (50-500Hz): Energy dissipation due to resonant cellular structure (loss factor tanδ > 0.3)

[0038] Low frequency range (<50Hz): Silicone viscoelastic damping (transmissivity <0.2)

[0039] Nonlinear damping characteristics

[0040] For small deformations (strain < 5%): Silicone dominates damping.

[0041] Under large deformation (strain > 15%): the plastic deformation of the wire mesh participates in energy dissipation.

[0042] The dynamic stiffness variation range is up to 1:5 (5-25 N / mm).

[0043] III. Enhanced Durability

[0044] Fatigue-resistant design

[0045] Wire mesh prevents crack propagation (fatigue life > 10) 7 (This is 100 times better than pure silicone)

[0046] The honeycomb structure disperses stress concentration (stress concentration factor decreases from 3.5 to 1.8).

[0047] Interface stability

[0048] Chemically plated copper layer enhances adhesion (interfacial strength ≥ 5 MPa)

[0049] Three-dimensional interlocking structure (steel wire mesh embedded in silicone to a depth of 0.1-0.3mm)

[0050] IV. Performance Comparison with Single-Layer Structures

[0051] Test Project Pure silicone layer This composite structure Increase Ultimate load capacity 20MPa 85MPa +325％ Vibration attenuation rate 40％ 75％ +88％ Temperature stability -30～120℃ -60～250℃ +110％ Wear rate <![CDATA[5.2×10 -6 mm 3 / Nm]]> <![CDATA[0.8×10 -6 mm 3 / Nm]]> -85％

[0052] In this invention, the first silicone rubber layer 32 and the second silicone rubber layer 33 adopt a honeycomb structure, and the honeycomb pore size of the first silicone rubber layer 32 is larger than that of the second silicone rubber layer 33. The upper silicone rubber layer 32 absorbs impact energy through the collapse of its large-pore structure (energy absorption rate 60-70%), while the lower silicone rubber layer 33 stores energy through elastic deformation of its small-pore structure (resilience rate > 90%). Combined performance: total energy absorption density reaches 18-25 J / cm³. 3 (40% improvement over uniform structure); Silicone rubber layer 1 32 (pore size 1.5-3mm): compression modulus 1-2MPa, to achieve initial contact buffer; Lower silicone rubber layer 2 33 pore size (0.5-1mm): compression modulus 3-5MPa to provide later load-bearing support.

[0053] Each of the following structures has four protrusions: 2 and 5, and the cross-sections of 2 and 5 are fan-shaped. The number and shape of the first groove 4 are the same as those of the first protrusion 2, and the number and shape of the second groove 7 are the same as those of the second protrusion 5. This increases the contact area during layer-by-layer connection and increases the torque force.

[0054] The wear-resistant surface layer 1, the composite layer 3, and the bottom layer 6 have openings at their centers. The thickness of the wear-resistant surface layer 1 is 0.1-0.3 mm; the thickness of the composite layer 3 is 0.5-2.0 mm; and the thickness of the bottom layer 6 is 1.0-2.5 mm.

[0055] To increase wear resistance, the surface of the wear-resistant surface layer 1 is fish-scale shaped. To achieve good lubrication, oil reservoirs 13 are formed on the surface of the wear-resistant surface layer 1. The surface of the wear-resistant surface layer 1 also has interconnected annular grooves 11 and vertical grooves 12, such as... Figure 2 As shown, the oil storage tank 13 is connected to the annular groove 11 through the vertical groove 12. The cross-section of the oil storage tank 13 has a small top diameter and a large bottom diameter, and four oil storage tanks 13 are arranged in a circular array; the lubricating oil in the oil storage tank 13 lubricates the surface of the gasket through the annular groove 11 and the vertical groove 12.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0059] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A composite shaft washer, characterized in that: The material includes a wear-resistant surface layer (1), a composite layer (3), and a bottom layer (6). The bottom end of the wear-resistant surface layer (1) protrudes outward to form multiple protrusions (2) arranged in a ring array. The top surface of the composite layer (3) is provided with multiple grooves (4), and the protrusions (2) are adapted to the grooves (4). The bottom surface of the composite layer (3) is provided with multiple protrusions (5), and the top surface of the bottom layer (6) is provided with multiple grooves (7). The grooves (7) are adapted to the protrusions (5).

2. The composite shaft washer according to claim 1, characterized in that: The composite layer (3) includes a steel wire layer (31), a silicone rubber layer (32), a silicone rubber layer (33), and a steel wire layer (34); a silicone rubber layer (32) and a silicone rubber layer (33) are provided between the steel wire layer (31) and the steel wire layer (34).

3. The composite shaft washer according to claim 2, characterized in that: The first silicone rubber layer (32) and the second silicone rubber layer (33) adopt a honeycomb structure, and the honeycomb pore size of the first silicone rubber layer (32) is larger than that of the second silicone rubber layer (33).

4. The composite shaft washer according to claim 1, characterized in that: There are four of each of the protrusions 1 (2) and 2 (5), and the cross-sections of the protrusions 1 (2) and 2 (5) adopt a fan-shaped structure; the number and shape of the groove 1 (4) are the same as those of the protrusion 1 (2), and the number and shape of the groove 2 (7) are the same as those of the protrusion 2 (5).

5. A composite shaft washer according to claim 1, characterized in that: Holes are opened at the center of the wear-resistant surface layer (1), the composite layer (3) and the bottom layer (6). The thickness of the wear-resistant surface layer (1) is 0.1-0.3 mm; the thickness of the composite layer (3) is 0.5-2.0 mm; and the thickness of the bottom layer (6) is 1.0-2.5 mm.

6. A composite shaft washer according to claim 1, characterized in that: The surface of the wear-resistant surface layer (1) is fish scale-shaped, and an oil storage groove (13) is opened on the surface of the wear-resistant surface layer (1); a connecting annular groove (11) and a vertical groove (12) are opened on the surface of the wear-resistant surface layer (1), and the oil storage groove (13) is connected to the annular groove (11) through the vertical groove (12).

7. A composite shaft washer according to claim 6, characterized in that: The oil storage tank (13) has a cross-section with a small top diameter and a large bottom diameter, and the oil storage tank (13) is arranged in a ring array of four.

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