Floating ring type magnetic liquid sealing device
A magnetic liquid and sealing device technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve problems such as leakage of sealing oil, damage to oil film, and failure of sealing
Active Publication Date: 2022-02-11
TSINGHUA UNIV
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Problems solved by technology
[0003] However, in the floating ring seal, there is an internal leakage problem that the sealing oil flows to the side of the sealed gas
And because the oil pressure of the sealing oil fluctuates, if the pressure of the sealing oil is lower than the pressure of the gas to be sealed, the gas to be sealed will enter the floating ring seal along the sealing gap, destroying the oil film, and the floating ring cannot keep floating. Contact and generate friction, friction generates a lot of heat, resulting in seal failure, and the sealed gas leaks outward
Method used
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Embodiment Construction
[0022] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0023] Such as Figure 1-3 As shown, the floating ring magnetic liquid sealing device according to the embodiment of the present invention includes a housing 1 , a rotating shaft 200 and a magnetic floating ring 300 .
[0024] Such as figure 1 with 3 As shown, the housing 1 includes an outer peripheral wall 110 and a cavity 120 surrounded by the outer peripheral wall 110, the cavity 120 includes a sealed cavity 130, and the sealed cavity 130 is filled with magnetic liquid, and the outer peripheral wall 110 has a longitudinal direction (such as figure 1 The liquid inlet 101 and the liquid outlet 102 are arranged at intervals in the left-right direction as shown...
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The invention discloses a floating ring type magnetic liquid sealing device. The floating ring type magnetic liquid sealing device includes a casing, a rotating shaft and a magnetic floating ring. The casing includes an outer peripheral wall and a space surrounded by the outer peripheral wall. cavity, the cavity includes a sealed cavity, the sealed cavity is filled with magnetic liquid, the outer peripheral wall has a liquid inlet and a liquid outlet arranged at intervals in its length direction, and the liquid inlet and the liquid outlet are both connected to The sealing cavity is connected, the magnetic floating ring is sleeved on the rotating shaft, there is a gap between the outer peripheral surface of the magnetic floating ring and the inner peripheral surface of the outer peripheral wall, and the inner peripheral surface of the magnetic floating ring There is a sealing gap between the peripheral surface of the rotating shaft and the magnetic liquid is suitable for being adsorbed in the sealing gap under the magnetic force. The floating ring type magnetic liquid sealing device of the present invention can prevent the flow of the liquid film between the floating ring and the rotating shaft, ensure that the floating ring always floats, and prevent the sealed gas from leaking outward.
Description
technical field [0001] The invention relates to the technical field of sealing, in particular to a floating ring magnetic liquid sealing device. Background technique [0002] Floating ring seal is a traditional sealing method commonly used in rotating machinery. By injecting sealing oil with a pressure higher than the pressure of the sealed gas into the floating ring sealing device, the sealed gas is prevented from leaking along the gap. The sealing oil is between the floating ring and the shaft. An oil film is formed between the floating ring and the shaft to avoid solid wear. [0003] However, in the floating ring seal, there is an internal leakage problem that the sealing oil flows to the side of the sealed gas. And because the oil pressure of the sealing oil fluctuates, if the pressure of the sealing oil is lower than the pressure of the gas to be sealed, the gas to be sealed will enter the floating ring seal along the sealing gap, destroying the oil film, and the float...
Claims
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IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 李德才陈思宇
Owner TSINGHUA UNIV