Conductive combined seal

Abstract

The utility model discloses a conductive combined seal, which comprises a metal conductive oil seal, a single-lip seal and a metal framework, the metal conductive oil seal and the single-lip seal are both buckled on the metal framework, and an oil seal spring for performing radial force compensation on a lip is arranged on the inner side of the metal conductive oil seal. An oil seal lip is arranged at the upper end of the outer side of the metal conductive oil seal, a dustproof lip is arranged at the lower end of the outer side of the metal conductive oil seal, a sealing lip is arranged at the end of the outer side of the single-lip seal, and a copper net is clamped in the sealing lip. The bearing can improve the sealing reliability, has a multi-lip sealing effect, and has the characteristics of strong internal and external power-on function, reduction of electric corrosion in the bearing, strong external medium prevention function and prevention of the interior from being polluted by external impurities.

Description

Technical Field

[0001] The utility model relates to a conductive function and double-lip fluid seal, specifically a complex conductive combined seal, belonging to the technical field of manufacturing key components of new structure oil seals. Background Technique

[0002] The function of the seal is to seal the internal medium and prevent the external medium from entering the inside of the seal. Nowadays, higher requirements are put forward for the seal, such as good sealing effect, long service life, preventing electric corrosion of the internal bearing, and being able to quickly guide the current out through the seal. Currently, the application of drive devices powered by motors is increasing. Due to the characteristics of motors, the failure mode of motor bearings is mostly electric corrosion, resulting in reduced motor life and increased maintenance costs, making the demand and reliability of conductive seals more and more urgent. However, the currently used conductive seals generally have problems of poor applicability, sealing performance and stability. Summary of the Invention

[0003] The purpose of the utility model is to provide a complex conductive combined seal, which can improve the sealing reliability, has a double-lip sealing effect, strong internal and external power conduction functions, reduces the occurrence of electric corrosion inside the bearing, has a strong function of preventing external media, and prevents the inside from being polluted by external sundries.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a conductive combined seal, which includes a conductive oil seal, a single-lip seal and a metal skeleton. The conductive oil seal is vulcanized together by conductive rubber and the metal skeleton. An oil seal spring for radial force compensation of the lip is installed inside the conductive oil seal. An oil seal lip is provided at the inner end of the outer part of the conductive oil seal, and a dust-proof lip is provided at the outer end of the outer part of the conductive oil seal. A sealing lip is provided at the outer end of the single-lip seal, and a copper mesh is clamped inside the sealing lip.

[0005] As a further preference of this solution, a PTFE layer is provided on the outer side of the oil seal lip.

[0006] As a further preference of this solution, a spring groove is provided inside the conductive oil seal, and the oil seal springs are connected end to end to form a circle and sleeved in the spring groove.

[0007] As a further preference of this solution, both ends of the metal skeleton extend forward, and the extending length of the tail end is shorter than that of the head end, and the thickness of the tail end is thinner than that of the head end.

[0008] As a further preference of this solution, the tail of the single-lip seal is provided between the head and tail ends of the metal skeleton.

[0009] As a further preference of this solution, the tail of the conductive oil seal is connected to the head end of the metal skeleton.

[0010] As a further preference of this solution, the copper mesh used is a copper mesh with 20 - 100 meshes.

[0011] The beneficial effects of the present utility model are as follows: The sealing effect of this conductive combined seal is reliable, fluid sealing can be achieved, and the internal and external sealing effects are guaranteed; at the same time, it has multi - lip sealing, strong ability to protect against foreign objects from the outside, and can prevent the inside from being contaminated by external sundries; it has strong internal and external power - on functions, and the current can be effectively guided through the functional module, reducing the occurrence of electrical erosion inside the bearing.

[0012] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an assembly schematic diagram of this conductive combined seal.

[0014] Figure 2 is a schematic diagram of the structure of a metal conductive oil seal.

[0015] Figure 3 is a schematic diagram of a single - lip seal structure.

[0016] The markings in the figure are: 1 - conductive oil seal, 2 - single - lip seal, 3 - metal skeleton, 4 - oil - seal spring, 5 - oil - seal lip, 6 - dust - proof lip, 7 - PTFE, 8 - sealing lip, 9 - copper mesh. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0018] As Figures 1 to 3 shown, a conductive combined seal includes a conductive oil seal 1, a single - lip seal 2, and a metal skeleton 3. The conductive oil seal 1 is vulcanized with a conductive rubber and a metal skeleton together. An oil - seal spring 4 for radially compensating the lip is installed inside the conductive oil seal 1. An oil - seal lip 5 is provided at the inner - side end of the outside of the conductive oil seal 1, and a dust - proof lip 6 is provided at the outer - side end of the outside of the conductive oil seal 1. A sealing lip 8 is provided at the outer - side end of the single - lip seal 2, and a copper mesh 9 is clamped inside the sealing lip.

[0019] In this embodiment, a PTFE layer is provided on the outer side of the oil seal lip 5. The PTFE is pasted on the inner side of the lip, and the shape and size are guaranteed by molding or cutting, so that the lip has a low friction coefficient, low heat generation and reliable sealing.

[0020] In this embodiment, a spring groove is provided on the inner side of the conductive oil seal 1, and the oil seal spring 4 is connected end to end to form a loop and is inserted into the spring groove. The spring is added before the oil seal is trimmed and assembled to compensate for the radial force of the sealing lip and maintain the continuous reliability of the seal.

[0021] In this embodiment, the metal frame 3 extends forward at both ends, and the tail end is shorter than the head end and thinner than the head end. The thinning of the tail end of the frame facilitates buckling of the frame and minimizes deformation.

[0022] In this embodiment, the single lip seal 2 has an interference fit with the shaft, and the conductive rubber in the lip area is sandwiched with a copper mesh 9, which is cut to ensure the size, reliable sealing, and strong conductive function.

[0023] In this embodiment, the dustproof lip 6 is formed by rubber molding, and is transitionally matched with the shaft to effectively prevent external media from entering the inner side of the seal.

[0024] During the production of this conductive composite seal, adhesive is applied to the contact area between the metal frame and the rubber. The metal frame and rubber are placed in a vulcanizer and vulcanized together under high temperature, high pressure, and sufficient time. A 20-100 mesh copper mesh is treated, coated with adhesive, and placed between the rubber. The two are vulcanized together under high temperature, high pressure, and sufficient time. Specialized pressure rolling is used to form a composite seal.

[0025] The above illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not in any way limit the scope of protection of the present invention. Any technical solution obtained by equivalent substitution or other methods falls within the scope of protection of the present invention. Any portion not covered by the present invention is equivalent to or can be implemented using existing technology.

Claims

1. A conductive combined seal, characterized in that, It includes a conductive oil seal, a single-lip seal and a metal skeleton. The conductive oil seal is vulcanized by conductive rubber and the metal skeleton. An oil seal spring for radial force compensation of the lip is installed inside the conductive oil seal. An oil seal lip is provided at the inner end of the outer part of the conductive oil seal, and a dust-proof lip is provided at the outer end of the outer part of the conductive oil seal. A sealing lip is provided at the outer end of the single-lip seal, and a copper mesh is clamped inside the sealing lip.

2. A conductive combined seal according to claim 1, characterized in that: A PTFE layer is provided on the outer side of the oil seal lip.

3. A conductive combined seal according to claim 1, characterized in that: A spring groove is provided inside the conductive oil seal, and the oil seal springs are connected end to end to form a circle and sleeved inside the spring groove.

4. The conductive combined seal according to claim 1, characterized in that, Both the head and the tail ends of the metal skeleton extend forward, and the extending length of the tail end is shorter than that of the head end, and the thickness of the tail end is thinner than that of the head end.

5. The electrically conductive combined seal according to claim 4, wherein The tail of the single-lip seal is provided between the head and the tail ends of the metal skeleton.

6. The conductive combined seal according to claim 4, characterized in that, The tail of the conductive oil seal is connected to the head end of the metal skeleton.

7. A conductive combined seal according to claim 1, characterized in that, The copper mesh uses a copper mesh with 20-100 meshes.

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