Anti-overpressure mechanical water seal

Abstract

The invention discloses an anti-overpressure mechanical water seal. The anti-overpressure mechanical water seal comprises a first shaft sleeve (1) and a second shaft sleeve (2). The first shaft sleeve(1) is internally provided with a first seal ring (3). The first seal ring (3) is connected with a support ring (5) through the first shaft sleeve (1). The support ring (5) is sleeved with a spring (6). The second shaft sleeve (2) is internally provided with a second seal ring (4). A cushion pad (7) is arranged between the second seal ring (4) and the second shaft sleeve (2). The inner wall of the second shaft sleeve (2) is in contact with a part. A guide ring (9) with the large inner diameter is arranged at the rim of the inner wall of the second shaft sleeve (2). A limiting ring (8) is arranged on the inner wall of the first shaft sleeve (1). The inner diameter of the limiting ring (8) is greater than that of the guide ring (9) and less than that of the inner wall, in contact with the part, of the second shaft sleeve (2). When the limiting ring (8) is in contact with the guide ring (9), the spring is not in the compressed state. The mechanical water seal intrinsically has the anti-overpressure function and can be mounted without tools; mounting steps are reduced; and cost is greatly saved.

Description

technical field [0001] The invention belongs to the technical field of mechanical sealing equipment, in particular to an overpressure-preventing mechanical water seal. Background technique [0002] Mechanical water seals are commonly used mechanical sealing equipment, especially for shaft parts that need to rotate. When the mechanical water seal is installed, the inner wall and outer wall of the water seal are tightly installed with the shaft and hole to be sealed respectively, and the inner spring of the water seal is compressed to make the ceramic ring and the graphite ring in the water seal tightly together. When the shaft rotates, the ceramic ring and the graphite ring Relative movement, but because the ceramic ring and the graphite ring are in close contact, they can still play a sealing role. [0003] During the installation process of the mechanical water seal, it is necessary to use a press to press the water seal and the parts tightly. In actual installation, it is...

AI Technical Summary

Problems solved by technology

[0003] During the installation process of the mechanical water seal, it is necessary to use a press to press the water seal and the parts tightly. In actual installation, it is easy to over-press and fit. The inner spring of the water seal has been tightened, but the press is still exerting pressure on the water seal, resulting in Ceramic rings and graphite rings are broken, causing irreparable damage to the water seal. Therefore, factories often need to make separate tooling for water seal installation. Expensive and costly

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