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Sealing means

A sealing device and vertical wall technology, which are applied in the directions of engine sealing, leakage prevention, engine components, etc., and can solve problems such as difficult swirling flow

Inactive Publication Date: 2016-01-20
MITSUBISHI HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to effectively suppress the swirl flow generated in the seal portion only when the swirl flow suppressing plate is provided on the seal fins.

Method used

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  • Sealing means
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] figure 1 is a schematic diagram of the sealing device of Embodiment 1 of the present invention, figure 2 is a sectional view showing the sealing device of Example 1, image 3 is a schematic diagram showing the relationship between the vertical wall portion and the protruding portion in the sealing device of Example 1, Figure 4 is a cross-sectional view showing the action of the sealing device of Example 1, Figure 5 It is a graph showing the peripheral speed of the sealing device with respect to the axial position.

[0039] In Example 1, such as figure 1 and figure 2 As shown, the sealing device 10 is disposed between the stationary body 11 and the rotating body 12 to suppress the flow of fluid flowing along the axial direction A and the circumferential direction B of the rotating body 12 between the stationary body 11 and the rotating body 12 (leakage). The seal device 10 is based on a labyrinth seal structure, and effectively applies an eddy current breaking ...

Embodiment 2

[0062] Figure 6 It is a cross-sectional view showing a sealing device according to Example 2 of the present invention. It should be noted that members having the same functions as those in the above-mentioned embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0063] In Example 2, such as Figure 6 As shown, the sealing device 30 is arranged between the stationary body 11 and the rotating body 12, so as to restrain the axial center direction A and the circumferential direction B of the rotating body 12 between the stationary body 11 and the rotating body 12 (refer to figure 1 ) flow (leakage) of flowing fluid. The seal device 30 is based on a labyrinth seal structure, and the eddy current breaking structure is effectively applied to improve the sealing performance.

[0064] That is, the sealing device 30 has: a plurality of first vertical wall portions 31 and a plurality of second vertical wall portions 32 provided on...

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PUM

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Abstract

In the sealing device, there are three ring-shaped rings extending from the stationary body (11) to the rotating body (12) and arranged at predetermined intervals in the axial direction (A) of the rotating body (12). a first vertical wall portion (21); extending from the stationary body (11) to the rotating body (12) side, and adjacent to the first vertical wall portion (21) and thicker than the first vertical wall portion (21) A ring-shaped second vertical wall portion (22); a ring-shaped protruding portion (23) protruding from the rotating body (12) to the stationary body (11) side opposite to the second vertical wall portion (22) and a plurality of vortex breaking chambers (24) arranged at regular intervals along the circumferential direction of the rotating body (12) on the stationary body (11) opposite to the protruding portion (23), thereby suppressing the contact between the stationary body and the rotating body (12). The flow between the rotating bodies can suppress the unstable vibration of the rotating bodies and improve the sealing performance.

Description

technical field [0001] The present invention relates to a sealing device for preventing leakage of fluid between a stationary side and a rotating side. Background technique [0002] In a fluid machine in which a rotating body is rotatably supported in a housing, a sealing device is provided between the housing and the rotating body to prevent axial leakage of fluid between the housing and the rotating body. In addition, a labyrinth seal is generally used as the sealing device. This labyrinth seal is formed by providing a plurality of sealing fins on at least one of the stationary side or the rotating body side of the casing, etc., and pressure loss occurs through the gap formed between the sealing fins and the stationary side or the rotating body side. , the leakage flow of the fluid in the axial direction is suppressed by this pressure loss, whereby the sealing function can be exhibited. [0003] However, in this labyrinth seal, there is a problem that the rotating body v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/447F01D11/02
CPCF16J15/4472F01D11/003F05D2240/55F16J15/447
Inventor 中庭彰宏深尾伸次
Owner MITSUBISHI HEAVY IND LTD