Mechanical seal device

Abstract

The utility model provides a kind of mechanical seal device, including packing ring, packing bush and end cover;Radially inwardly extending dog is equipped on the end cover, and the outer wall of packing bush is equipped with axially extending clamping groove, dog is embedded in clamping groove, and the axial displacement and radial displacement of packing bush are limited;The packing ring is coaxially sleeved in packing bush outer, and the end face of both forms sealing pair;Spring, annular spring, adjusting washer, elastomer one, elastomer two are sequentially stacked between the packing bush and end cover, the section of elastomer one is U type, and the section of elastomer two is triangular sealing ring.The utility model can effectively reduce the component quantity of mechanical seal structure, improve the assembly of mechanical seal, avoid the misplacement of component to cause sealing failure, improve mechanical seal reliability, reduce production cost.

Description

Technical Field

[0001] This utility model relates to a mechanical sealing device, belonging to the field of dynamic sealing design technology. Background Technology

[0002] A mechanical seal is a shaft sealing device used in rotating equipment. It prevents fluid leakage through the relative movement of two precisely matched sealing surfaces. It has advantages such as good sealing effect, long service life, and ability to adapt to harsh working conditions. If the mechanical seal structure fails, it will lead to fluid leakage, which may result in fluid loss or even serious safety accidents.

[0003] Currently, traditional mechanical seals are complex in structure, difficult to assemble, and have high production costs, such as Figure 1 As shown. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a mechanical seal device that can solve the problems of low reliability and easy misalignment of traditional mechanical seals.

[0005] This utility model is achieved through the following technical solution.

[0006] This utility model provides a mechanical sealing device, including a sealing ring, a sealing bushing, and an end cap; the end cap is provided with radially inwardly extending claws, and the outer wall of the sealing bushing is provided with an axially extending groove, the claws being embedded in the groove to restrict the axial and radial displacement of the sealing bushing; the sealing ring is coaxially sleeved on the outside of the sealing bushing, and the end faces of the two form a sealing pair; between the sealing bushing and the end cap, there are springs, ring springs, adjusting shims, elastic body one, and elastic body two stacked in sequence, wherein elastic body one is a sealing ring with a U-shaped cross section, and elastic body two is a sealing ring with a triangular cross section.

[0007] The end cap and sealing bushing are fixedly connected to the equipment housing.

[0008] The sealing ring is fitted onto the rotating shaft.

[0009] The number of springs and adjusting shims are both two, and they are arranged symmetrically in the circumferential direction.

[0010] The beneficial effects of this utility model are: it can effectively reduce the number of parts in the mechanical seal structure, improve the assemblability of the mechanical seal, avoid seal failure caused by misalignment of parts, improve the reliability of the mechanical seal, and reduce production costs. Attached Figure Description

[0011] Figure 1 It is a sealing structure in existing technology; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 yes Figure 1 Schematic diagram of the middle end cap; Figure 4 yes Figure 3 Schematic diagram of the middle chuck claw; Figure 5 This is a schematic diagram of the triangular sealing ring of this utility model; Figure 6 yes Figure 5 Cross-sectional view along the AA direction; In the diagram: 1-Sealing ring, 2-Sealing bushing, 3-Elastomer 1, 4-Adjusting shim, 5-End cap, 6-Elastomer 2, 7-Spring, 8-Ring spring, 9-Claw. Detailed Implementation

[0012] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0013] like Figure 2 As shown, the axial and radial displacement of the mechanical seal components is restricted by the cooperation between the end cap 5 and the sealing bushing 2. The end cap structure is as follows: Figure 3 As shown.

[0014] Specifically, the spring 7 and the adjusting shim 4 provide clamping force to the sealing ring 1 and the sealing bushing 2 to ensure the reliability of the mechanical seal.

[0015] Specifically, spring 8 provides preload to elastomer 3, which, in conjunction with elastomer 6, prevents fluid leakage.

[0016] Specifically, the structure of the claw 9 is as follows: Figure 3 As shown, the axial and radial displacement of the mechanical seal components are limited by the cooperation of the claws 9 on the end cover 5 and the sealing bushing 2.

[0017] Furthermore, the structures of elastomer 1-3 and elastomer 2-6 are as follows: Figure 5 and 6 As shown, elastomer 3 and elastomer 6 form an auxiliary seal.

[0018] In summary, this utility model employs two springs and two adjusting shims, which improves the reliability of the mechanical seal; the use of a triangular sealing ring makes it less prone to twisting during installation, reducing the risk of assembly errors; the geometric shape of the triangle allows for more even stress distribution under high pressure, reducing local wear and extending service life; it can significantly improve the assemblability of the mechanical seal device and reduce production costs.

Claims

1. A mechanical seal device, comprising a sealing ring (1), a sealing bushing (2), and an end cap (5), characterized in that: The end cap (5) is provided with radially inward extending claws (9), and the outer wall of the sealing bushing (2) is provided with axially extending grooves. The claws (9) are embedded in the grooves to restrict the axial and radial displacement of the sealing bushing (2). The sealing ring (1) is coaxially sleeved on the outside of the sealing bushing (2), and the end faces of the two form a sealing pair. Between the sealing bushing (2) and the end cap (5), there are springs (7), ring springs (8), adjusting shims (4), elastic body one (3), and elastic body two (6) stacked in sequence. Among them, elastic body one (3) is a sealing ring with a U-shaped cross section, and elastic body two (6) is a sealing ring with a triangular cross section.

2. The mechanical seal device as described in claim 1, characterized in that: The end cap (5) and sealing bushing (2) are fixedly connected to the equipment housing.

3. The mechanical seal device as described in claim 1, characterized in that: The sealing ring (1) is fitted onto the rotating shaft.

4. The mechanical seal device as described in claim 1, characterized in that: The number of springs (7) and adjusting shims (4) are both two, and they are arranged symmetrically along the circumference.

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